#demon chat noir au

[pinkikiwi]

@marichatmay 2024 Snow in may + Angelic/Demonic

Kissing statues under the snow...

I thought a lot of possible scenarios for this paiting, like why chat noir is a stone? why is snowing in may? Marinette know Chat Noir before he was turned into a stute and she love him but never confess, you know, the kind of stuff you think while paiting a posible AU.

[queenlypirate]

Nighttime routine with a girl and her contracted demon

more about the au in this tag here: https://queenlypirate.tumblr.com/tagged/demon%20chat%20au

also my friend @fragileizywriting has a fic series on ao3!!

[pizza-bug]

Ghouligans are back 🤧👻

@art-the-f-up did a post-reveal adrinette bugfeed unsolved au; i had the sudden urge to resuscitate these two so badly

[xhanisai]

Demon Chat Noir and Sorceress Marinette 👀

In this AU, Marinette makes a contract with the demon of Destruction, Chat Noir. This story is set in a fictional world a thousand years ago. Marinette was an orphan, barely five years old and was dying so she made a prayer to the demon and was met with a shadow with the kindest, soothing voice she's ever heard.

Much to Chat Noir's surprise, she only summoned him because she wanted a companion so she didn't die alone. So, he gave her an alternative and finally revealed his true form to her (a golden-haired boy around her age with the most beautiful eyes she's ever seen, wearing a black mask and adorned with feline ears and a tail). He will prolong her life, rid her of all her illnesses and misfortunes and in return, she becomes his.

Marinette shows no fear, in fact, she's very, very happy with this proposal and takes it as her becoming his bride.

Here's a snippet:

Suddenly, his form began to morph and change, her eyes widening before the exceptional and beautiful sight that took place before her, something that even the most holiest and devout religious figures could ever dream of observing. And before she knew it, the demon was now a blond, beautiful boy.

He looked about a year or two older than her, his top half of his face adorned with a sleek and mysterious black mask and strange kitten like ears perched on his head, his emerald greens like the most beautiful stained glass she's ever seen. He was beautiful...so, so beautiful. Is he really a demon?

"I have a different idea," He started, his voice ethereal and soothing. The girl was almost hypnotised by it that she almost failed to register the loving way he placed her head on his lap as he remained kneeled on the floor. One of his clawed fingers combed through her matted and tangled tendrils as if it was made of silk.

Piercing emerald greens met fading sky blues.

"I will get rid of your illnesses and bear your misfortunes and make sure you live a long life," He leaned down closer, their foreheads touching. "In return, you become mine," His eyes flared as if they were flames, a delicious fire flickering with her body. "Your body, your heart and your soul. They become mine for eternity. I get to stay by your side forever, I'll age humanly too to avoid suspicions of the humans around...and I will look after you and protect you in a manner I like,"

.

He expected a sign of hesitation. He expected fear in her eyes.

.

He didn't expect her cold, trembling fingers grazing his jaw and a beautiful, beautiful smile on her face.

"Are you asking me to be your bride?" Her voice was filled with joy and happiness, making his heart flutter and sing. "This deal seems more beneficial to something like me...are you sure you want me?"

"You doubt me?" He nose brushed hers, his voice no louder than a whisper and he couldn't help but relish the bloom of red that appeared on her cheeks. "Be mine, give me your name,"

.

"Marinette...my name is...Marinette Dupain-Cheng..." Her heart tickled even further within her pained chest, the awe in his emerald greens only making the failing organ pound harder in delight.

"Do you, Marinette Dupain-Cheng, take the Weilder of Destruction, Chat Noir, as your partner? For eternity?"

"I do,"

"Then, without further ado, I'll seal the contract. May our fates stay entwined for generations to come," Without that said, the demon removed his mask, giving her the full view of his ethereal beauty...

And he kissed her.

Thank you so much for your ask, Amy! Feel free to ask more questions about this AU or anything else from the WIP list! <33333

Ask WIP game

[sfigatino]

Made a cover for this fic on Wattpad by @lea-panthera, check it out! The fic is super cool and this was really fun to make!

[miraculousverse]

Chat Noir Live comic (EXTRA)

LukAdrien

After a very painful breakup, Adrien worked as a streamer for a while until he started dating Luka and realised that he's no longer interested in performing for an audience and wants to pursue a different path in life.

He's still unsure what he wants to do as a career because all his life he was exploited by his own father and Adrien is convinced that the only thing he is good for is his good looks.

In his previous relationship he was mentally abused by his partner, who used Adrien's sexual preferences and past insecurities against him to control and manipulate him.

For a long time Adrien couldn't start a new relationship because he was wary of people.

His romantic relationship with Luka is his first relationship where he feels safe and understood but his past demons still haunt him and Adrien is afraid that one day Luka will be disappointed in him.

Luka knows about Adrien's unfortunate experiences with romance and being a perfect gentleman, is ready to give Adrien as much time as he needs to heal and move on.

!! This AU and comic have mature themes !!

[monpetitchattriste]

Rating: Teen And Up Audiences Warnings: Graphic Depictions Of Violence Relationships: Adrien Agreste | Chat Noir/Marinette Dupain-Cheng | Ladybug, Adrien Agreste | Chat Noir & Marinette Dupain-Cheng | Ladybug, Alya Césaire & Marinette Dupain-Cheng | Ladybug, Alya Césaire/Nino Lahiffe Characters: Marinette Dupain-Cheng | Ladybug, Alya Césaire, Adrien Agreste | Chat Noir, Sabine Cheng, Tom Dupain, Nino Lahiffe, Gabriel Agreste, Nathalie Sancoeur Additional Tags: Romance, Slow Burn, Like extreme Slow Burn, but in a good way, Hurt/Comfort, Angst, Bullying, Emotional/Psychological Abuse, Physical Abuse, Child Abuse, Fluff, Alternate Universe - No Miraculous Jewels (Miraculous Ladybug), Ice Skating AU

Summary: Marinette just wants to get through the school year unnoticed. After transferring to a new private school, she hopes to leave behind her troubled past and focus on ice skating. But a certain boy keeps invading her thoughts, complicating her plans. Adrien didn’t expect to fall in love after winter break. Recovering from an injury and pressured by his strict father to excel, he wants no distractions. Yet, something about the new girl keeps drawing him back. As they navigate the school year, Marinette and Adrien find comfort in each other. Marinette’s fears and Adrien’s responsibilities clash, but their growing friendship and undeniable chemistry make it impossible to stay apart. Marinette battles her inner demons while Adrien fights to protect her, deepening their unexpected bond. Fate brought them together, but love binds them as they face hidden scars and secrets. Marinette must decide if she can trust Adrien, and Adrien must balance his feelings with his father's expectations. Can they overcome their past traumas and be together, or will the challenges tear them apart?

[pearl484-blog]

WIP poll

1. Ephemeral Lament: After finding a journal full of future akumas and their causes, Alya realizes that it is her sworn duty as a hero to stop them, even the impossible ones like Mrs. Dupain-Cheng facing racism, Chat Noir finding his mom's body and...Adrien’s abuse?

2. Senti-beast: During the fight with Kwamibuster, Ladybug accidentally finds out Chat Noir's secret identity. Ladybug isn't sure what she suspected, but it wasn't that her partner was a monster. AU where Adrien is a beastly sentimonster

3. Fathomless Depths: When their bonds to life begin to fade

A Black Cat may decide to stray

And heed a call from the mortal plane

Into the depths of Death's Domain

After a fight with Chat Noir causes him to retreat to the Underworld, Ladybug must go on a quest to save him, but in a realm where dreams are reality and logic is madness, will Ladybug be able to rescue Chat Noir from his terrible fate? Or will both of them succumb to their demons?

4. Reverse Carol: The ghost of Chat Noir takes Ladybug on a tour of his life so she can see the problems of their past and change her ways, before she loses him for good.

5. Disappearing Hack: When a mysterious hacker starts erasing all traces of Chat Noir from the internet and replacing him with other heroes, Alya and Ladybug team up to find the culprit and end this once and for all. Meanwhile, Chat Noir is enjoying some peace and quiet after scrubbing himself off the internet.

[artzychic27]

More Scarlet Warlock Stuff/Sabrina The Teenage Witch AU

(You know, the campy early 2000s version)

Everything in the world of Miraculous: Tales of Ladybug and Chat Noir is the same, except Nathaniel is 1/64th warlock on his late father, Maison's side

No one... Except maybe Alix knows he's a warlock

Along with Akumas and Amoks, there are supernatural threats from the magical world plaguing Paris that Nathaniel often takes care of with his magic

When he died, Maison left behind his familiar, a hand-sized goat named Stardust (Bragging rights go to whoever can guess where I got the name)

Like all familiars in the Magic Realm, Stardust is a sentient magical totem that sits atop a witch or warlock's magic staff. They can also switch between a wooden totem and a living form. (... Yeah, that's right. I like Owl House)

Stardust immediately bonded with Nathaniel after Maison's passing and often headbutts his leg when he returns from school

There's also a warlock named Klaus who was cursed by Maison and turned into a rooster for all eternity after he tried to take over the world three times. Aya often threatens to turn him into nuggets when he smartmouths her

His classmates have no idea that Nathaniel's a warlock, but they do notice strange things happening around him

Nathaniel: Later, Kim. *His locker door closes without him touching it, and he leaves*

Kim: ... What the hell?!

—

Juleka: … Are you a witch?

Nathaniel: Nope. *Thinking* ‘It’s not technically a lie; I’m a warlock.’

—

Alya: Hey, Nath, would you mind- ARE YOUR EYES GLOWING?!

Nathaniel: *His eyes stop glowing* No, they’re not.

Alya: They definitely were!

Nathaniel: Then, you just need new glasses.

Chloé and Louis are always trying to prove how "weird" Nath is, but he's always one step ahead of them, usually cursing them for a few days until they eventually back off

He keeps his wand in his boot… Also, he wears boots now

There’s just a lot of magical stuff lying around the house, a Wishing Rod, a Spooky Jar, a Magic Typewriter that types what you think, a collapsible cauldron (perfect for traveling), a halo that lets you spot demons and imps, a few magic amulets, a magic sketchbook that makes whatever you draw come to life, memory leeches, and a hammer space bag

There’s also a talking newt in the basement

Aya’s always fighting at least one strange creature in the kitchen, like a tentacle that just shot out from the sink drain

Aya: Wanna go, you hentai motherfucker?! Let’s fucking go! *Proceeds to hit the tentacle with a wooden spoon*

Nathaniel: *Walks in the kitchen* Hey, mom? Have you seen my backpack?

Aya: By the door, sweetie.

Nathaniel: Thanks. Oh, and there’s some repellent in the cabinet to your right.

Aya: Thanks, dear!

[i-like-anything-water]

I have- (Crashes into a tree) -Returned!!

Here's a Chloenette thought: What are your thoughts on a possible Chloenette AU where Queen Bee replaces Chat Noir as Ladybug's partner? Also, what do you think Chloe's Top Ten Favorite Anime are?

I've read a fic about this but my thoughts personally would be Chloé discovering someone is capable of putting her in place without the need to resort to blackmail, smear campaigns, money or even violence. Then she realizes she's gay xD.

I kinda want angst for LadyBee actually. Fluff is more of a MariBee thing for me and LadyBee just has that tension that's different from Chloenette but is still magnetic in a way where:

'You should have left me. They got away."

"And let you die?!"

"I can fix everything. I have a cure!"

"You can't fix the fear everytime I see you hurt. You cannot fix the part of me that dies everytime you almost do."

Or they could be a comrades to lovers to discovering their real identities kind of thing but I really like the first one. The angst, hurt/comfort and slow building of trust through both wins and losses until everything is too far in deep and they don't know if they could choose the world or the other if faced with the decision.

I can't give ten since I only watched a few and I cannot include some since I think it's not Chloé's taste but some of them are probably:

I'm In Love with the Villainess

Citrus (first wlw she found but I think it's not really her cup of tea)

Bloom Into You (again, as a baby gay)

JJK (found a Nobara x female character edit/fan art)

AOT (mainly stayed for Ymir x Historia

Demon Slayer (this is kinda 50/50 but she could have gotten on board cause of Adrien)

Sailor Moon (Need I say more)

[mielkexnn-miraculous]

A. Agreste (aka Chat Noir) Headcanons <3

Kind of a lot tbh—just headcanons that I like to apply in my AUs when they don’t clash with their particular premises. It’s just a hot mess under the cut yeah? Cool.

He was actually in ballet classes as a kid—the same ones as Chloé.

What’s funny is that Marinette was there too. However, boys and girls were kept separate and so he only really knew Chloé.

He only found out when he was going through his closet and found a shoe box with his old shoes and a bunch of class photos; he noticed Marinette in the corner of one.

He’s still really flexible though.

He actually used to go to see a live rendition of The Nutcracker each Christmas.

He wanted to play the Rat King rlly badly.

He’s got a killer steady hand that makes for rlly good cursive.

He has the neatest handwriting in the class, and takes rlly good notes too—particularly in physics.

He’s also got terrible sense in fashion. He knows good stuff when he sees it, but doesn’t know bad stuff is bad at all.

He really likes milk; in some horrible twist of fate, he’s also lactose intolerant.

He’s totally touch starved and rlly touchy feely w/ certain people.

He refuses to kill bugs. He once screamed and lifted Alya up off her feet for trying to squash a spider in the middle of science class.

He put it in a cup before disappearing for a good five minutes so he could walk all the way over to the park to release it where it would be safe.

He’s English and French.

He really likes gelato—specifically passionfruit; peach is a close second tho.

He knows how to run in heels; has a subtly burning hatred for them.

He really likes light up sneakers though and always wanted a pair.

He knows Morse code.

Rlly ticklish.

Sneezes super loudly.

Really crappy immune system thanks to never being allowed outside his castle walls; he got sick like three times within the first two months of school.

He really likes Piano Man by Billy Joel and can sing and play the whole thing.

Honestly his music taste consists of five types of music: Heavy/classic rock, classical/classical-style music (In The Hall of The Mountain King slaps ok), Billy Joel, chill-somber-sad-theatric-feels-y, and whatever the heck that migraine-inducing bs he’s got stashed in the back is.

His Spotify is a hot mess tbch; lots of spontaneous playlists depending on how he felt at the moment. The titles are usually smth along the lines of “ifykyk”, “vibe”, or “yeah”; either that or just the playlist #.

He has like five that are nice enough to send ppl, and those are the only ones he’s listened to more than twice. They’re called “Classical Vibes”, “Cheese Demon”, “Billy Joel Aesthetic”, “sad”, and “Spontaneous 2am Dance Party OST”.

He’ll literally save recommended playlists and never listen to them.

He never bothers to clean it up though, and has 600+ playlists sitting around.

Also he used to drink a ton of pediasures as a kid and his father doesn’t let him drink them anymore bc he’s not a little kid anymore obviously but he would kill for a muscle milk.

He’ll throw up if he ever tries to eat kale again; it’s a trauma response ok.

Emotion smart but social dumb.

Honestly kinda yandere ngl.

I mean have you seen this man?? Cheez-its man, chill.

He resists when in civilian form but once he’s transformed it’s Full Gremlin Mode activated.

He’s not good at drawing but he does try; he does a lot of blob style digital and is slowly getting better.

He overcomes his feelings of being stuck and not knowing what to do in life as seen in wish maker when he spends time with the Dupain-Chengs and realizes that that is what he wants. He then dreams of working in the bakery one day.

Cannot for the life of him resist eating the batter, ok. He needs it. He’s gonna get heckin’ salmonella one of these days and it’s going to have been worth it.

He gets really good at frosting “flower” cupcakes. He switches to succulents pretty easily after learning how to airbrush. They’re adorable.

Also really good at modeling lil fondant animals and things.

He’s developed separation anxiety surrounding both ladybug and Marinette—he rlly just wants to have both of them in one place at once and he’s rlly sad that it somehow never seems to happen; he’s rlly happy post-reveal.

He rlly loves babysitting; like honestly he loves kids, so so so much; if he weren’t thinking of taking over the bakery (and/or tied down as Chat Noir), he’d probably become a pediatric nurse or a daycare attendant or smth bc 💞💞💞

He’ll leave the press to Ladybug so he can talk w/ the akuma victims and make sure they’re okay.

He’ll escape out his window and climb to high places when stressed to pace.

Once lost a Chat Noir look alike contest.

Has referred to his civilian self as, and I quote, a “dipshit boytoy” whilst en costume.

He became a total night owl thanks to his miraculous but he’s just rlly good at pretending to not be tired.

He’s more cat than he’d like to admit:

He’ll react to catnip when transformed;

He’ll also chase laser pointers;

He subconsciously stares at birds;

Once a bird got stuck in the classroom and everyone was freaking out trying to catch it in a wire trash bin and stuff but it kept evading them so Adrien looked up and pulled out his music, watched it for a second, and then caught it by the feet mid-flight;

He brought it closer to himself and calmed it down as best he could, petting it as he walked over to the window to let it out;

Everyone was flabbergasted but no one said anything as he went back to working and by the time anyone could speak it was kinda late for questions;

He gets the zoomies at the most inconvenient times;

He’s made incredibly uneasy by dogs despite actually being more of a dog person.

Also more destruction powers seeping in alongside the cat attributes:

When he’s is in a funk, there’s crappy cell service, lights flicker, machines go haywire and burn out;

If he’s REALLY upset, drinking glasses and crystal can spontaneously combust;

His powers trickle over into when he’s a civilian;

He just keeps getting more and more frustrated with his computer as it begins to function less and less and keeps giving increasingly worse error codes;

He’s in a funk for the first half the day at school and for some reason the wifi is down;

His mood is lifted after a good lunch break and all of a sudden the computers are working super fast;

Though it frustrates him at first, Adrien learns to hone his powers and either repress or, if needed, direct them.

That’s all I have for now! Feel free to adopt/modify any of these as you please :)

[gale-gentlepenguin]

Miraculous ladybug: Demon slayer AU

Marinette: Breathing style: Life breathing (derived from Flower and Love breathing). Allows for graceful movements and allows the user to take in all of the area to help synchronize themself with nature.

Alya: Breathing style: Mirage breathing (derived from mist breathing and Flame breathing). Flashy and focused on misdirection. A style that makes the opponent misread movements and even tricks foes with afterimages

Nino: Breathing style: Bubble breathing (derived from mist and wind breathing) Mainly defensive style that’s meant more for protecting others than slaying demons. Said to be the best defensive style.

Luka: Breathing style: Music breathing (derived from Sound breathing)

Kagami: Breathing style: Dragon breathing (derived from Water, Wind, and Thunder style breathing)

Alix: Breathing style: Time breathing: (a derivative of thunder breathing) focused on speed, allows the user to slow the world around them in order to move and process information.

Chat noir: Blood art: Destructive aura. A blood art that let’s chat noir destroy anything he touches with his aura, even Nichirin blades. He can coat his entire body in the aura. The effects Even impact other demons, messing up their healing factor. His strength and potential are said to be comparable to that of an upper moon despite the fact that he is only half demon

[summerflame104]

I know it’s been a while since I posted anything about the miraculous pokemon au, but I got inspired by some stuff from Pokemon Arceus when talking to my partner.

Essentially, Adrien gets sent to the past due to an incident with Celebi. He essentially camps out in the wild, helping pokemon where he can. He ran into a younger version of his adopted dad (Yusaku) who’s kinda going through it. Dark types especially are pursecuted here. So pokemon like Darkrai and Zoroarka are going through it. Adrien was really distraught to find that the Zoroarks were hunted to the point of dying and being reborn as ghost types. as a result, he changes his costume while here to be reminiscent of a modern day Zoroark.

The humans are somewhat suspicious of Adrien when he comes to other towns for supplies or a decent bed because they tend to be suspicious of outsiders. He tries to be surprised though.

Chat Noir on the other hand is someone they fully believe to be a cat shadow demon. His similarity to Zoroark definitely makes them uneasy and feel like he’s a monster with unexplainable power.

Long story short, I had to get this altered design out if my head. Chat’s modern, regula design is also up there.

[streaminn]

Demon baby au

Say, if being bonded with Belladonna gives Enid a version of Lightning powers, when Oleander give Enid a version of Destruction powers?

Essentially yes!

While Oleander can easily manipulate destruction as in being able to condense it into balls of power and yeeting it

Enid is stuck going full chat noir, so if she ever wants to use it she'll need to place her whole hand

[camirazone]

Miracle of Chu: The Rogues Gallery

It wouldn’t be a good superhero story without some villains, although really only one of them is an actual villain and the other two were dragged into this nonsense.

Without further ado, here is our gang!

Sapphirus.

The whole story starts because of Sig accidentally finding the peacock miraculous on a search for bugs. He’s granted the power to become Sapphirus, who can make sentimonsters, and Sig just goes “why not lmao” and starts making some bug friends. Unfortunately he loses control of them pretty quickly due to being pretty new to his powers and they start causing issues, making him the catalyst for the events to unfold. 

Thank god for Argos existing as it gave me some good reference for what a male Mayura may look like. Thanks to @greenysoliatre​ for her original design as well which you can see next to Black Sig. Eventually he ditches the hood once everyone realizes he’s not a threat at all, but they still have a lot of work to do.

Lepidoptera

“Who the hell is this” This is Carmen, Greeny’s OC and sort of the catalyst for why this AU even became a thing in the first place. She found the butterfly miraculous in Oshare’s shop, the latter finding it randomly and thinking it looked ugly, so he put it up for sale at a cheap price. Carmen is immediately rushed into action by Nooroo, who tells her about a great threat, and feeling bad for buying her way into being a hero, she accepts the offer and becomes Lepidoptera. Initially she believes Sig’s sentimonsters are the great threat, so using her powers, she can turn the citizens of Primp into champions...until THEY’RE mistaken for the great threat. Of course, while everyone is tangled up in a huge misunderstanding, the real threat is lurking in the shadows.

I don’t have much to say on her design wise, other than that I was watching way too many Callimara videos for my own good and gave Greeny the idea to add a hat because I liked the idea of it looking quite sinister. She ditches it after it’s revealed she’s also not really much of a threat.

Drache

By far one of my favorite characters to write. Ayashii sounded like a kwami name, so we decided to make him a core part of the story.

Long ago, when Accord was Chat Noire, she was up against the all powerful demon Ayashii. Before Ayashii could get away with all the Miraculous, she used cataclysm to strip him of his corporeal form. This caused the miraculous to get spread out across the world and possibly other dimensions as well, but that part is irrelevant. Ayashii was lodged into the Dragon Miraculous, taking over the kwami’s body. Conveniently, it happened to be the kwami of perfection.

Years later, while Klug has a rough day at school, he goes home only to find one of Lepidoptera’s butterflies going about. Curious, he touches it and is accidentally turned into a champion. Of course his ass is kicked pretty quickly by Coccinella and Chat Noire, so he’s a little upset at losing this cool power. Luckily, or I suppose unluckily, he find the Dragon Choker, and thinking someone lost it, he just keeps it on him hoping to find the owner. Ayashii grins, finding a new body after all these years.

Now Drache goes around menacingly, hoping to get all the Miraculous in hopes of world domination. He is able to use the 5 Chinese Zodiac Elements (Fire, Water, Wood, Metal, and Earth) at his disposal (The OG show only really had Water, Lightning, and Wind which is kinda unfitting with Ryuko’s design.) His hair is blue here because it reflects the elemental dragons in Chinese mythos, who were blue. Longg was also that color before Ayashii’s possession of him, so it definitely adds to it. 

Character design isn’t my strong suit but it is definitely fun. Now we got our whole crew done. (Yippee!!)

[writerofcrazydreams]

Butterfly effect of the Reversal Salt AU

First thing first, I'm not bashing Adrien, Marinette, or anyone. However, the narrative is mostly from Lila's POV so, of course, she'd throw insults like candy, undermine everyone's worth (such as calling them by a superficial attribute instead of their names), and exaggerate their flaws.

On a related note. ML's characters are flawed. Marinette has creepy stalker tendencies, Chat Noir is a dogged nice guy, the class takes advantage of Marinette (even if unwittingly), and Mme. Bustier is an enabler for bullying. I'm not willing to overlook those flaws but seeing most of the characters are teenagers, I think they have room to grow and all of them deserve a chance for redemption. Yes, even Lila, loath as I am to say it. Most of the kids have also virtues worth of notice.

Secondly, this is a writing prompt. After reading too many Lila Salt Fics and a Lilanette one I stumbled upon by accident, my brain decided to wonder how would a Salt Fic be if Marinette and Adrien's roles were reversed.

For want of a nail (i.e., transferring six months later in the year), Lila has set her sights on budding fashion designer Marinette Dupain-Cheng. Because Marinette is infatuated by Adrien Agreste, Lila needs to get him out of the way. As a result, she plans on ostracizing him from the class and demonizing him so Marinette would lose interest. Lila's actions have some unexpected positive side effects. She's possessive, so everything Marinette does has to be to Lila's benefit which leads Lila to shame the classmates on how much they take Marinette for granted. Whether Lila successfully traps Marinette in an abusive romantic relationship it's up to whoever wants to continue this thing. More impactful is the fact Lila was never akumatized into Volpina or Chameleon, thus preventing Heroes' Day from happening. This means that Hawk Moth achieved the mass akumatization and discovered the temporary heroes' identities in another way or didn't do it at all. Another ripple effect is Lila getting a Miraculous by virtue of being on Ladybug's good side. I don't think Rena Rouge will be replaced, so no Volpina, but I'm betting she gets one of the Zodiac Miraculous or the Peacock if the heroes manage to retrieve it from Mayura.

In spite of a nail, Lila still eventually associates with Gabriel Agreste to manipulate his son into doing her bidding. And I can assure you she's still the cause of several akumas (the shaming part). She will still wrap Damoclès and Bustier around her little finger by claiming she's being bullied by a fellow student. Furthermore, it's still well in the realm of possibility Lila gets akumatized at some point. The girl' still has a penchant for holding petty grudges, so it's bound to happen. Maybe she does get turned into Volpina or Chameleon, but it will be later and in different circumstances. "The Collector" still happens more or less the same as Gabriel will akumatize himself to retrieve the Grimoire and get the heroes off of his trail, though there's the chance the middlewoman (Ladybug) is cut and Chat Noir gives the book directly to Master Fu, causing him to meet the guardian. Will that make Adrien a more responsible hero and prevent his tantrums from being locked out of the loop? It depends. If somehow Ladybug and Chat Noir go together, Ladybug will still be Fu's successor but Chat Noir will know more things from the get-go. If it's only him, either the guardian contacts Marinette later or starts training Adrien. Keep in mind, though, that his packed schedule won't allow him to visit Fu as frequently as Canon!Marinette could.

Whether she starts working for Hawk Moth is uncertain, though. It depends on your take on this prompt so nails don't have a say in this matter. Or not an obvious one, at least.

In the third place, this is a writing prompt and, as such, people have utter freedom to make of it what they want. Wanna bash the hell out of Adrien? Of Alya? Mme. Bustier? Chloé? Even Marinette? Go on. I think the kids can grow into better people, but if other writers disagree, have different stories in mind, or are simply salty over someone, I won't be the one to put limits to their creativity and desires. The same applies to whomever you choose to redeem. That's why I left it very ambiguous throughout the prompt on whether Chloé is working towards her Redemption or following her canonical Damnation. She defends Ladybug because she loves the heroine, she snickers when Alya has to change seats because she feels vindicated ("Origins" episode), and she stands for Adrien because he's her childhood friend. In the former case, both the vindication and the insults are little steps backward, especially considering Chloé knows how much Adrien fears conflict (he won't and doesn't defend himself that much).

Having said that, for all I respect freedom of speech, that doesn't mean I'll condone or agree with everything people write inspired on this prompt. Have fun, but it's not my responsibility if we end up with a "Dead Dove: Don't Eat" kind of fic, okay?

Fourth, here are some of my ideas about this Reversal Salt AU.

Lila's mother, here dubbed as Signora Rossi (Signora means Mrs. in Italian), is not an abusive parent but possibly a slightly neglectful one. That doesn't mean she's a bad person or that she loves her daughter any less. It just means she's caught up in a very demanding job either because she's ambitious and wants to succeed in her work field (which is fine) or because she's a single mother and thus is stretching herself thin to fulfill her daughter's physical and emotional needs. Or maybe she just wants to believe the best of her daughter and turns a blind eye to Lila's misdeeds. Despite that, she's caring and loving. I'm not keen on demonizing Signora Rossi because of these reasons but it is clear she ought to pay a little bit more attention to what her daughter is up to and is likely she for some reason failed to instill integrity in kid!Lila. An excellent take on this matter can be found in this fanfic: "A mother's love".

On the other hand, it's also entirely possible Lila was born a psychopath. I've been researching and some psychologists hold that a sociopath is made through trauma and a psychopath is born, but the result is the same anti-social tendencies. Though if you want to make her a sociopath and give her a traumatic past, go on. Canon!Lila not only scores high in psychopathy but also Machiavellism and Narcissism.

In regards to her other parent, I left their gender ambiguous because there are some fan theories that Lila has two mothers. Or it's maybe just an animation error, but I don't like to throw the chance out of the window. Now, in the case it wasn't a mistake, both mothers are what I described a paragraph ago but fanfiction exists to explore different scenarios anyway, so... Maybe this other parent influenced Lila to become who she is now.

About Adrien. As I said above, the kid does have some nasty flaws. What he does to Ladybug at the very least verges on sexual harassment and he's proven to be manipulative (throwing tantrums when rejected). In this AU, said flaws are at play as much as Marinette's flaws were in canon. She partially misused her powers out of jealousy (partially because she had a point in that Lila was making herself a target) and her reasons to eavesdrop on Lila and Adrien are definitely not pure. Here, it's her tendency to obsess over and idealize her crush what is going to be her downfall. I'm not victim-blaming, but abusers prey on their victim's weaknesses and those just happen to be Marinette's. And that's not counting how Marinette's yearn for control was aggravated since the "Chat Blanc" incident (it happens later, but the base is already there). Nonetheless, I'm of the idea that Lila opened Marinette's eyes a little when she attacked her crush on Adrien (like pointing out being a stalker is not healthy) and that's going to bite her in the ass later on. Marinette being a doormat to her friends is more tricky since Lila made it as to ensure Marinette will remain a doormat to her but not anyone else. It's workable when the time to heal comes.

By contrast, Adrien's doormat policies, pushiness, obliviousness, and social ineptitude are still going to be rocks in his path. He's now crossed at Lila for several reasons. The obvious is her "bad-mouthing" Chat Noir, but there's more. Up to this point, Lila has consistently stirred trouble in the classroom, menacing the peace he values so much. It's Lila's fault (or that's how he sees it) Marinette is "abandoning" her friends and being "mean" to them. His upbringing has left him rather unable to understand that kindness is not a synonym of "absolutely catering to someone's wishes" (as he often does with Chloé and always with his father) and that this behavior is not healthy. His obliviousness comes into play in regards to just how much Marinette means to him (platonically or romantically). Lila has been monopolizing Marinette all to herself even when the class hangs out as a group, which severely cuts the already scarce time the two interact. He's jealous without being aware of it. It doesn't help how touchy-feely Lila and Marinette are because it sometimes causes discomfort to the latter, which Adrien picks up and not only notices Lila's hypocrisy but also rubs him in the wrong way as it mirrors his behavior as Chat Noir. Now, don't get me wrong, the least he wanted was to cause a scene but couldn't help but glare and Lila capitalized on that.

What does Lila think of Ladybug? "Volpina" never happened and this Lila only intended on pursuing Adrien before discovering Marinette's promising career, so neither hates the other one nor harbors a grudge. In fact, I doubt this AU would last much if that were the case. I left open the possibility of Lila being the anti-Chloé (hates Ladybug, loves Marinette) with that part of suspecting Marinette is crushing on Ladybug (*laughs in Plagg*), but I have to note that the hatred cannot be mutual for this to work. Canon!Lila loathes Chat Noir and it's likely that will remain the same, just less vocal (Marinette admires Ladybug and has a way of contacting the heroine, so Lila won't bad-mouth Chat Noir in front of Ladybug).

What roles would Luka and Kagami play in this AU? Obviously, the love-dodecaedron has shifted. There are at least three people after Marinette/Ladybug's affections: Chat Noir, Luka, and Lila. And whoever you ship Marinette with. And, now, there are only two girls wanting to date Adrien/Chat Noir: Kagami and Marinette. Chloé is uncertain because it was stated at some point she wasn't in love with Adrien, she was just possessive for some reason (fanon says it was to protect him from fangirls and fanboys). One possible scenario in this AU is that Marinette's feelings towards Adrien fade for the most part (maybe they will resurge later or shift to return Chat Noir's), depending on how efficient you want to portray Lila.  Getting back to the point, Luka still has a crush on Marinette as revealed in "Silencer" and Kagami on Adrien but the events of "Oni-chan" developed differently and it's as equally possible that she confessed her crush on him/was akumatized than it hasn't happened yet. If Lila somehow catches wind of Kagami's crush, she will set the two up to force Marinette to move on. She might even encourage Marinette and Kagami's friendship to bind Marinette to obey the girl code and support Kagami. If she learns of Luka's crush, then she'll either play the card that "he's too old for Marinette" (if we disregard the retcon) or try to exclude him from the class' activities. Taking more extreme measures will tip Marinette off of Lila's true nature. As I side note: I like this more than canon because I'm TIRED of watching four girls fighting over a guy.

How will Alya and Nino react? Without the jealousy component, what are the grounds to dismiss his warnings? Well, Adrien still takes the high road so he won't publicly confront Lila on her manipulations. He dreads conflict too much and if he finally does it, it will be too late — either Lilanette is official or everyone else believes so, therefore the class will be prone to believe Adrien is jealous. The lack of public accusations also rob Lila of one of her primary strategies: turn on the waterworks. Consequently, everything will be much more underhanded. Lila's association with Gabriel will result in Adrien spending far less time with his friends and maybe even pulling the same stunt of threatening them in the hopes of creating powerful akumas (again, "Chat Blanc" episode). But I digress, Lila will relentlessly target Alya and Adrien for supporting LadyNoir. Maybe Alya will learn her lesson but as Adrien already sees Lila in a bad light, he will take longer to budge or won't do it at all. Nino will try to change Adrien's opinion and that'll cause a gap between the two. Nino is very laidback, so he won't push as much but will be vulnerable to Lila's poisoning. Alya will remain Marinette's friend but butt heads with Lila as the latter tries to correct her occasional forcefulness. Marinette will intervene and either Alya regards Lila in a positive light because she did help Marinette (in a sense) or by holding onto her stubbornness will have a fallout with Lila and seek flaws on her. All in all, Alya and Nino's behavior are wildly variable. The only secure thing is that Lila is as capable as in canon of swaying them to her favor and making them unwittingly throw a friend under the bus, just in a different way.

I don't know if you've noticed but there's a theme about how holding onto flaws can sometimes yield positive results, often aided by virtues. In canon, it was how holding onto virtues can sometimes yield negative results, often exacerbated by flaws. Marinette's hatred of liars and loyalty to her friends are virtues but landed her on a bully's bad side and got isolated. Her jealousy and stalker tendencies (both flaws) didn't help matters at all. Meanwhile, Adrien's desire to see the best in everyone and give second chances are virtues but they made him act in the wrong way and fail to support a friend. His learned fear of conflict and submissiveness only made things worse. Lila has the virtue of being charming (for the wrong reasons, but still) and knowing her way with people which would turn her into a fine leader. Yet, she causes mayhem and destroys people's lives by using those virtues along with her fatal flaws — narcissism and vindictiveness.

In the Reversal Salt AU, however, most of the positive results stem from holding onto one's flaws. If Alya remains stubborn, she eventually learns Lila's nature aided by her reporter abilities and determination. If Marinette refuses to let go of her obsessiveness and refuses to think the worse of her friends, she forces Lila to ditch subtlety and thus expose herself. If Adrien continues walking the high road and keeps being nice, he provides Lila with far less ammunition against him. Nino has proved to be distrustful (dismissing Marinette in the Lila ordeal and believing Alya is two-timing him in "Rocketear") and if he does that here, he'll catch on to Lila's manipulations and even call her out given his outgoing nature.

This brief interpretation is merely a suggestion and, again, you are not obliged to use it as the central theme of your story. Personally, I'd use the whole "holding onto flaws gets better results" as a temptation in the characters' arcs whereas the "working on my flaws unwittingly aids the villain" as an angst-fuel when the characters learn of Lila's manipulations. One of the traits of an abusive relationship (romantic or otherwise) is how much the victim struggles to stop believing their abuser's words. Nobody is always wrong, so if my abuser was right about/helped me with this thing, would they be right about/had helped with this other one? Often, it comes down to finding a balance: you keep whatever good things you got from the relationship while discarding the harmful ones. Naturally, this is a lengthy, stressful process that Lila can very well exploit to blackmail her victims, make them second-guess themselves, or just make them miserable.

Last but not least, I want to comment on two Lila Salt Fics that depict similar ideas, although I only found them after crafting this AU. Little spoilers warning about them. The first is "Liar's New BFF" and delves into the idea of Lila being the anti-Chloé. After having her lies exposed at the end of "Volpina", she starts regarding the classmates as vermin and genuinely falls in love with Marinette because of her kindness. She then proceeds to create a riff between Marinette and them by pointing out how much they take advantage of her. In this case, Lila is partially redeemed and doesn't seem to hold a particular grudge against Adrien. The Reversal Salt AU can follow a similar path if you want to, but the idea is to not shy away from Lila's many shortcomings as a human being and how that would affect Marinette and Adrien in an alternate scenario.

The other is "Jerk in Sheep's Clothing", where Lila's spear counterpart, called Henri, acts pretty much as I described Reversal Salt!Lila. He gets infatuated by Marinette and after threatening Lila, makes a deal with her so it's easier for both to accomplish their goals (Lila: get Adrien and be popular, Henri: get Marinette all for himself). He exploits Marinette's broken trust in the classmates to bully them and get away with it, collaborates with Hawk Moth at some point, and even gets a Miraculous. The difference between them is that Reversal Salt!Lila doesn't have the benefit of Marinette being emotionally vulnerable due to Canon!Lila's bullying, nor her faith in her friends is weakened. This means this AU's Lila must resource to more deceptive tactics to get what she wants (she can't blatantly lie).