#sleepy bois inc headcanons

[nomsfaultau]

Imagine big scary boar Techno with a warlock pact with The Blood God. Only problem? It essentially turns him into a sparkly magical girl of the pink hair twink techno variety. And he just has to suck it up because the thigh high heels and tutu give him an insane combat bonus.

The rest of sbi tease him, or at least until he gets fed up and accidentally ✨sanguine sparkle blasts✨ Tommy into a concussion. At which point they tease him outside of melee range.

[michu-chaotic]

SBI + sibling!reader (plotanic)

Summary: Headcanons of the SBI with a younger sibling!reader walking into their room after having a nightmare.

c!Philza

So for Philza I'm gonna make him be your dad instead because we love dadza <3.

He's definitely a light sleeper and is usually always up to like 2am so once he hears your little sobs from across the room, he'd come rushing to you.

Will help you calm down by playing with his wings whilst doing breathing exercises :D! He will not leave your side until you're fully calmed. If your nightmare was THAT bad he will stay by the side of your bed until you fall asleep.

"I won't let anything happen to you, okay? It was just a silly nightmare <3"

He has three other sons so he's pretty much always ready for this moment <3.

Tommyinnit

Grumpy and heavy sleeper. You'll have to wake him up by softly poking his shoulder. At first he'd be like "What is it now?" still being half asleep, until he notices it's you and the tears in your eyes. He'd immediately go soft and sit up and ask what's wrong.

He'd honestly be like "It's just a nightmare, it's not real so don't worry." And wipe your tears away.

He doesn't really know what to do but he'd offer you to sleep with him if you want so you feel a bit more safer!

Also add the "Don't tell anyone about this."

Wilbur soot

Wilbur is another heavy sleeper tbh. But once he sees you all teared up, he'll just take a guess and scoot over so you can lay down beside him while telling him what happened. He would hum to one of his songs until you gradually fall asleep !!

If you're not ready to fall asleep, he'll just put on a funny video on YouTube for you to watch until you drift off to sleep again.

Depending on how bad your nightmare was, he will sometimes carry you back to your own room again and tug you in while you're sleeping or he'd just let you sleep in his arms.

c!Technoblade

He's a light sleeper as Philza. He's always on look out and stuff. But once you came into his room in tears with your comfort teddy in your hand while he was writing a letter he was like "Aren't you supposed to be asleep- oh."

He'll come up to you and carry you into his arms and sit on his lap. He'll ask what's going on and what the nightmare was about. He's unsure about what to do, but he had Tommy coming into his room after a nightmare when he was a small kid so it's nothing new.

He'd just make you do breathing exercises and do these cute piglin noises to make you laugh <3. He'll let you sleep in his bed and hum you a lullaby until you fall asleep.

[psiithirisma]

Technically the nickname “Theseus” is canon on origins (see. Techno pushing Tommy off the pub afollowed by a “So long, Theseus”). So may i offer you:

headcanon that avians go through a phase where they climb things to jump off them afterwards.

When o!Tommy was going trough that phase, he tried to jump off a cliff when nobody was looking and that's how he gained the name Theseus.

Thankfully, o!Techno jumped and caught him in the air and by doing so, also saved o!Phil from a cardiac arrest 👍

although it's needless to say that o!Phil is not too fond of the nickname

o!Phil: most siblings give each other shortened versions of their names as nicknames or something that reminds them of a funny memory. You call your little brother “Theseus” because he jumped off a cliff

o!Techno: well, well, it is a funny memory to me, so--

[cosmic-d1ce]

Minecraft-Sinfonia & SBI family qsmp headcanons bc mmm they <3

* Chayanne is one of tue shortest eggs, second only to Tallulah

* Phil is also really small, he's like 5'4" and is very thin, which is why its very surprisingly to see him fight

* Missa is big and defenseless, most people assume hes the one they should be wary of

* Missa was very happy about marrying Phil, Phil was not so happy about it ⇩

* Kristin isn't canon, when Phil talks about her, he's talking about his hardcore world, which is one of his past lives he remembers. They're soulmates but Kristin doesn't exist here so he just has vague memories of the love of his life and can't get to her

* Missa is away most of the time because he's the son of La Catrina and technically isnt a human. He isn't just away from home, he leaves that reality

* Phil doesn't sleep like ever, when he does its when Chayanne tricks him into taking his bed so Chayanne can have the big one. Or when Missa physically forces him into bed and he immediately falls asleep ⇩

* Anytime Phil does sleep, he has nightmares about Chayanne and Missa being in danger, which is why he sleeps very close to Chayanne

* They're all very very paranoid all the time

* Missa is the most reasonable one but is often very impulsive so it doesn't show often but when he has a moment to think he is the most logical of the three (Phil and Chayanne jump to violence and war crimes, Missa goes "mmm maybe rethink that sweethearts")

* Phil is autistic and avocado toast is his safe food, his family has to deal with the consequences /j

* Chayanne is very protective of his family and friends because he thinks of himself of the pack leader and the strongest of the eggs

* He also adores Tallulah and after Tilín died, he is way more protective of his neice than anyone else, he won't fail again

* Phil and Chayanne's paragliders are actually mechanical wings. They can't fly but gliding is close enough

* Chayanne and Tallulah are the same age, just like all the eggs, but Chayanne appears much older (like Tallulah looks 2-3 and Chayanne looks 10-11)

* Chayanne has dreams about Techno a lot and pretends he doesn't notice Phil tearing up when he tells him

* Phil really isnt that old, he seems it because of his past lives and Wilbur isnt biologically his kid, Wilbur was adopted. Theres only ~15 years between them so Wilbur was like 12 and Phil was 27

* Currently Wil is 24 and Phil is going on 40

* Comparatively, Missa is going on 90 as he's immortal and doesnt age physically

* Chayanne is a water dragon and he loves ducks

* The dream Chayanne had about the crows saving his was actually chat

* Everyone's chats are like conscious omnipresent entities and not everyone can hear them but Phil and Wilbur have a very strong connection to theirs, as did Techno

* Sbi family dynamic real (+Chayanne and no Tommy(the way it should be/hj))

* Techno was actually Phil's brother not his son, i physically cannot see them as father and son its not right

* Techno used to terror Wilbur and Wilbur now does the same to Chayanne, they love eachother

[screennamealreadyused]

when wilbur was born, kristen asked techno if he wanted to hold him. techno said no. phil rolled his eyes, thinking he probably had an aversion to babies because of the whole orphan thing. no, techno was just scared he was going to break wilbur because he was so small.

a couple weeks pass and they can't get wilbur to settle down and sleep. they put him in the crib and close the door, content to let him tire himself out. within minutes, wilbur settles down. they open the door a crack to see techno in the rocking chair, wil against his chest, and techno's very quietly retelling the myth of orpheus and eurydice

[t0rs0evens]

No cuz it’s crazy cuz I’m right and no one believes me

Bpd + adhd

OCD + ADHD + AUTISM

ADHD + AUTISM

Philza can be debated cuz I’m not 100% sure but I’m sensing dyslexia (struggling only really lack of controls with 3D motor issuses), dysgraphia, and a wee bit of autism but I’m not 100% on that one

[elliot-needs-sleep]

no thoughts, head empty, reader who can’t cook. like i imagine everyone on the server can cook to varying levels of quality but in the end it is all edible no matter what they do. but not reader-

it can be angsty if you would so desire, like maybe reader was raised by dream and never learned to cook because he wanted them to be completely dependent on him for survival or maybe reader is a workaholic who never had the time to teach themself and therefore is used to just eating vegetables and horribly undercooked and/or overcooked meat that they’ve developed an immunity to the side effects because of how much their body is used to it. or maybe it’s just haha funny and a running joke that reader can’t cook (maybe they’re a blaze hybrid with hotter flames than most and therefore can’t get the temperature right for cooking, your choice!).

it’s just a fun little idea i came up with that i’m giving you full reign to have fun with :D

yours truly,

gremlin anon

This is a mood except I am a great cook /hj

Fic type: Headcannons

Characters: SBI (Philza, Techno, Tommy, Wilbur)

Fandom: DSMP

"How do you live like this" was the first thing Philza said when he walked through the door. He was only mildly disappointed (after all, he did have to teach Wilbur and Tommy to cook)

Mostly because you were frantically opening windows and fanning out smoke with a hand towel.

In your defense, you were a blaze hybrid like Sapnap and had FAR less control over the flames you could create

He takes over to at least make you something edible, especially after you burnt a steak into a charred piece of meat.

Techno honestly just found it amusing to watch you struggle because you're just a hilariously bad cook.

Will he make you something to eat when you inevitably under or overcook something? Probably. He might not care that much.

He does feel a bit bad, but overall he thinks that you getting angry enough to through whatever you were making out the window is the funniest thing he ever saw

Wilbur CAN cook, but doesn't like to and honestly coukd care less about how badly you do

L'manburg Wilbur specifically would probably offer to help

Ghostbur would try to cheer you up and keep you from throwing a rock hard piece of meat at a wall

Revivedbur? He'd make fun of you. Guaranteed. No question. He thinks its hilarious how bad you are, but unlike Techno he would actively tease you about it

Tommy is also a bad cook. No contest. But he IS better than you are.

He doesn't make fun of you per se, but he will yell at you to get out of kitchen so he can at least make EDIBLE food

He's not too mean about it, and he finds it mildly annoying that you're this terrible

But he also thinks it's just a bit funny too

[garrafoncitoda]

🏵️GhostInnit🏵️

I made this during Spooky Season in a little activity I did with my partner. The ideas was draw something with ghost theme while we watch "Nightmare before Christmas", so I did what a I do best:

I drew Tommy

So, here some of my favorite headcanons about GhostInnit

GhostInnit keeps always with him some stuff of the living world, such as an allium gifted by Ranboo, the Friendship Emerald and the prosthetic Techno made for Alive Tommy during exile. Some of them he kept them out of necessity and some out emotional attachment.

GhostInnit has lava tears. His tears can't hurt him, but they can definitely hurt others and burn stuff, that's why he can't hug anyone or anything while crying. He's really afraid of hurting the people he loves or damaging the stuff that makes him happy.

Most of GhostInnit's memories are bad memories. He remembers a lot of traumatic stuff Alive Tommy lived like November 16th, most of the exile, Doomsday, the Final Control Room, the duel with Dream and the Pit. He doesn't remember his last death at Prison, the Community House fight and some Pogtopia stuff.

Even if GhostInnit likes a lot physical touch, he doesn't like when people touches his wrists, it makes him remember all the times Dream took him roughly by the wrists during exile. That's why he keep bandages on his wrists, so if anyone touches them, the panic won't be as much as it would be with direct contact.

GhostInnit is always afraid when he's with Philza and Techno. He remembers so much Doomsday, so even if he wants to be with his family, he can't bring himself to feel as safe as he used to feel with his father and brother.

So yeah, enjoy the ✨angst✨

[ne0spac3-g0v3rnmen7]

sbi plays monopoly

phil has all the railroads. every. single. one. nobody ever really lands on them, but he thinks its pretty cool

wilbur is taking this as seriously as he can, "are you sure you want to do that," and he's just staring at you with the most terrifying stare like ever

tommy is pissed off because he was the first to lose. he is so close to just losing his shit because this is the 5th time he lost first

technoblade owns like 2 neighborhoods and maxed every single plot. welcome to capitalist's lane

[astronomic-explorer]

idea: modern au techno has albinism, hence the red eyes. he dyes his hair pink bc he prefers it over the pale blonde

[god-of-balance]

DSMP x Reader x OC's Incoorect Quotes Pt. 4

StarWorld(OC): Well, aren’t you all a rag-tag group of adventurers with unclear goals and good hearts! Oh, let me guess: you’re out to save the world! Techno: Well, actually, that sounds like a pretty fair assessment. Syrex(OC): More or less, I guess... Wilbur: That sounds awesome! Let’s do that! Wolfy(OC): I’m new here, but I am open to the concept. Tommy: I thought that’s what we were doing, guys, come on! Y/n, lying in bed with a pillow over ears: I just want sleep!

[lilyminer]

My “what dsmp characters smell like”headcanons! Cuz why not headcanon about that?

(I’m not weird, your weird just go with it.)

Wilbur- Wilbur smells like cinnamon and cigarette smoke (affectionate). The cigarette smell really started getting noticeable when his mental health started deteriorating but it was always there. He smells like cigarettes in the way my grandpa used to, the kind that’s kinda tolerable for a time.

Tommy- In a way Tommy can usually just be described as smelling like Wilbur or Tubbo. But yeah he usually smells like dirt, grimy in a country kid kinda way. Cigarette smoke from Wilbur, and the spices and herbs Niki used in her baking back in the L’manburg days. I headcanon he always used to go out and pick the ones they grew in the gardens around l’manburg for her.

Tubbo- As you could probably imagine Tubbo changes widely based on the arc. During early dsmp and l’manburg he always smelled like flowers and honey or dirt when he went on adventures with Tommy. Paralleling Tommy he smelled of alcohol during his time in manburg as a spy, and then mostly gunpowder and soot during the later fighting and snowchester.

Niki- As I’m sure you know when she’s happy you’ll find the smell of pastry’s and fresh baked bread follows her everywhere. When she stopped baking it would be hard to pick up on anything but the unsettling absence of that smell.

Eret- I know for a fact Eret smells strongly of strawberries and wine. After l’manburg at least, he always smelled just like you’d imagine royalty should smell. Generally very sweet smells.

Philza- Ok hear me out, like a field of wheat on a sunny day. Also apple cider and a warm meal. (Shhh he’s my comfort character I get to say what specific thing he smells like)

Techno- Techno’s pet hoarding obsession shows here, he definitely smells like his dogs. Like Phil I also think he smells like a warm meal, maybe stew. In and after battles the smell of blood clings to him so strongly it’s said to be a warning of his presence . . . so um, anyways!

Ranboo- For some reason I think of the smell of blackberries, maybe other berries as well but definitely blackberries. When ender walking or experiencing strong emotions like panic or sadness he has an extremely strong almost poisonous scent similar to ozone. I headcanon that’s an endermen thing, like that’s what ender particles smell like.

Sapnap- Pretty obvious but burning or ashes, I do headcanon him as Bads son and half demon so yeah. It also made people panic back in the wars he was a part of, people would think stuff was being lit on fire when he was around.

Foolish- Foolish definitely smells like incense and fresh ocean air. A walking air freshener if you will. I like to think a few hundred years ago he walked into one of his seaside temples and the smell appealed to him so much he gave himself that scent forever. I’m pretty sure gods would be able to open the character creator window and just select what they want to smell like.

[cosmic-d1ce]

The ribbons on Phil and Wilbur's mc skins are Techno's old hair ribbons

[ccraccz]

Hiya! I saw your Heartsteel requests were open so I wanted to ask for headcanons of the Heartsteel boys with Fem!Reader who’s very sleepy. I mean like, constant naps during the day or sometimes they doze off and become forgetful. And maybe they’re a night owl so they’re constantly up gaming all night!

Night owl attraction

Characters: aphelios, ezreal, sett, kayn, k'sante, yone x Fem Reader

(Implide sauce)

Context: you're a night owl, sleeping here, napping there, but at night, when the sun is down, you live laugh love.

Aphelios

He's with you on this

Aphelios does most of his work at night time and usually takes naps throughout the day.

That was before becoming part of the band, where everyone is usually awake in the day time

So his sleep schedule is kinda (very) messed up.

But knowing you're also a night owl makes his life all the much more easier!

You will always be his excuse.

Naps on his bed? He's ready in the dark, arms wide open, in bed.

You forgot something at your place but are too tired to get it?

He's gone out to get it, don't fall asleep yet though

He'll join you soon!

At night time is were everything goes party rockin

You have your own little space.for gaming in his room you're that important!

He makes his music, has you listen to it and add some input, you play your games, and do you work

Easy as that!

Though, sometimes, he just wants to sleep with you when you have so much energy at night time

Especially on days the band has to go to events

He really wants to stay up with you but he really can't 😕

So most of the time you get your mobile games and play while he's laying on your chest

Or he'll get you tired in another way 😏

Ezreal

He would totally nap with you

But be quite sad that you're always napping when he has the most energy

He really loves to go on dates throughout the day and you always napping always makes him hold off on that

Poor beby

You both are total opposites

During the day he's energetic, you're sleepy

During the night time, your energetic, he's sleepy

Ince he tried sleeping through out the day and staying up at night

He'll never do that again

It gave him a giant headache since he wasn't used to doing that

So he learned that he should tell you the plans beforehand and write them down on a calendar beside the sink in your bathroom because he knows you'll forget

And he'll remind you every 1 hour

He doesn't mind that you nap and are forgetful because of that, but he's slightly peeved by it

He loves you too much to tell you that though

Though if he's incredibly tired at night and all he wants is to hug and sleep with you in his arms

He'll definitely do everything he can to get you tired

Even if it's slightly messy.

Sett

He would totally try to encourage you to wake up early and start your day

He doesn't understand why you're so active at night??

Like??? Huh???

He'd definitely ask you why you sleep so much during the day

Poor beby wants to know how to accommodate you and your likes and dislikes

If you want to wake up but just have trouble, so you just don't

Every day, he'll encourage you to get up with kisses and hugs and breakfast and more!

It'll be difficult at first but he understands, and he'll carry your around if you fall asleep anywhere.

If you don't want to fix it, like ezreal, sett would be a bit peeved but wouldn't do much about it

He lives you for who you are, but it's kinda difficult, literally being an early riser and a night owl couple

He totally understands after you ex0lain it to him but I think he'd feel left out when you're alway in bed and hes.always doing something else

Same thing your way, at night time he's always asleep, alone without you, and you're always gaming or working

He'd try his best and would definitely carry you around when you fall asleep somewhere though!!

Kayn

He'd be a total menace

Waking you up everytime you fall asleep because 'if he can't be asleep l, then you can't either!'

His words

You better have a good reason as to why you're still awake at 3 in the morning-

Oh, work? Understandable, get in bed as soon as possible though, tomorrow you have a date to go to and he wants you awake and alive during it!

Rhaast would totally try to control and wake you up in the most inhumane ways

Like throwing you into a full bathtub

But kayn is still a sweetheart so he won't let him do that.

Sometimes, all he wants to do is lay on your tits and fall asleep

But most of the time, you're working or playing games, and it's so annoying to him

So he tries to keep you awake at all times and have you sleep with him, which usually works!

Other times, he lets you sleep here and there because he knows you're trying your best, but it's just so difficult

And, uncommonly, he'll sleep with you during the day and night if you know what I mean 😏😏😏

K'sante

He's a bit like Sett

Not an early riser but doesn't send his day in bed like you

When he first notices, he asks you about it thinking something is wrong

If you want to work on it, he'll definitely help out

Waking up early, early jogs, cold showers

All along with morning kisses and hugs

He'd, at first, would feel so guilty about waking you, but it's for a good cause

If not, he'd be kinda annoyed by it, but would understand that you've been dealing with this for a while, so you're definitely used to it, and change is quite difficult

At night time, when you're most active, he tries to give as much affection and love before he goes to sleep

Most of the tikenthat means you taking action in bed but whateves

He loves you so much but wishes he'd be able to interact with you more throughout the day without disturbing your precious sleep

And sleeping without you just isn't the same as the naps you both take after lunch

It's just so lonely and wonky he doesn't like it at all

Give k'sante more love, I beg!!!

Yone

(Like alune, there's literally no gifs for yone and that makes me sad)

He'd definitely be more disturbed by it but would understand.

He'd have a calendar every corner lmao

I front of the bathroom mirror so you see it behind your reflection, on the fridge, in your closet, anywhere!

He loves you so much but it's hard to live someone whose always napping

He'd wake you up in the most gentle ways

Kisses.on the forehead, cheek, pouty lips

Fixing your hair, gliding his fingertips over your face as he admires you

Calling out your name in gentle whispers and chuckling when you whine because you don't want to wake up

He thinks you're so cute and gets used to waking you up every now and then.

He's a total insomniac, though, so he's sometimes awake with you, working on songs when he doesn't take his meds.

And he usually only falls asleep with you in his arms so it's a but more difficult to sleep when you're awake.

So someday, when he doesn't want to work, he ask you to have fun with him instead 🤭

-------------------------------------

Note!

Augh YOUR BRAIN IS SO BIG I LOVED THIS REQUEST SO SWEET!!! Thank you so so much for requesting!!! 💙💙💙💙 BTW it was kinda difficult to show that this was a fem reader because I want to include as many body types as I can, so I didn't describe the body ad much as I would have if I had a specific body type so, IM SORRY BOUT THAT 💙💙💙.

[nomsfaultau]

I couldn’t sleep so sleep headcanons for Sleepy Boys Inc! 

(Specifically my SCP AU) ((Also Tubbo fight me))

The Blade: to call it a light coma would be underselling it. He simply does not wake up. It’s especially heavy after a battle, and sometimes when he’s really sleepy he’ll circle a spot three times before flopping down. Snores in a deep rumble that Philza pretends sounds sweet like purring but this is simply not the case. Unfortunately he tends to sleep outside because he is simply Too Big for most human doors. It doesn’t tend to effect him though.

Tommy: it does affect Tommy though, because he 100% always curls up next to The Blade, though sometimes it’s hard to spot him. Often wakes up squished, and shouting doesn’t wake The Blade but it occasionally gets Philza’s help to squirm out. One day he’s going to suffocate to death in The Blade’s fluff. Tommy doesn’t care though, since physical contact helps him calm down much faster after nightmares. He is very proud of the fact he doesn’t wake up screaming anymore, since that would mean interrupting his friends’ sleep. 

Philza: only sleeps because he’s convinced he has to. Preferably, coiled on top of his hoard children. Wings seem to naturally form a cocoon around him and whomever is closest. Often ends up in whatever sleeping arrangement Tommy and The Blade are in. This has led to the three of them getting referred to as ‘the pile’. Occasionally prone to day napping like the old man he is, in which case his natural habitat is a warm flat rock for him to bask on like a little lizard. Everyone keeps telling him he isn’t actually cold blooded, but he just waves them off and spreads out his wings to better catch the sun’s heat.  Wilbur: like three miles away from everyone else, because he’s edgy and has control issues. Barely sleeps at all, and a chronic insomniac because he can’t outrun memories at night. Which could be solved if he ever TALKED to his FATHER, but, again, edgy and control issues. Sleeps with a flashlight and his shoes on and is always ready to bolt up in a second. Midnight snacks if he thinks they can afford it. 

Tubbo: Theoretically familiar with a bed, but much prefers to be twenty feet up in a tree in a little nest of blankets and pillows. When actually sleeping on the ground, tends to wake up in a field of newly blossomed flowers. They’re usually teased for this. Technically hundreds of thousands of bees don’t sleep at the same time, so Tubbo is usually on watch duty. A handful of bees tend to dapple Tommy’s hair like a crown, to make sure he’s sleeping well or be there if he gets a nightmare. 

[theokapuco]

I actually did this drawing a while ago but when I finished I didnt like it so I didnt end up posting it but now looking back, I still don't like it but I spent a long time on it soooo, here's Thomas as a Siren and below is some Info dump about this Au I made

Since I am also a sleepy bois inc fan, I got inspired by dark sbi mermaid fanfics and decided to test it out on the Maze Runner and see what it leads me to. So, just a heads up, the Maze Runner characters in this Au are more morally gray because they follow their animalistic side more than their human side. 

In this Au, they in a hierarchy and every mermaid lives in their own pod (a community)

Hierarchy goes like; Leaders, Sirens, Children, Protectors, and Hunters/Gatherers

It is not a requirement to have a Siren in the Pod but it does make the pod seem stronger if they do have one 

There tends to be only one siren in each pod because in this AU they are cannibals and are not afraid of eating another siren from their own pod or a different one 

The color of a siren represents what types of power their voice holds, Thomas in particular has the ability to manipulate people’s sadness and grief, he can make others see hallucinations of loved dead ones or intensify someone's state of sadness/depression/loneliness. The jewelry around his neck is a symbol of his status and showing how important his voice is.

Short plotline; Thomas is a lone siren who does not have a pod. He gets invited to join the Gladers pod by Alby but problems arise when Thomas realizes that they already have a siren in their pod, Ben. At first they would stay far away from each other, with Ben always hanging in the front of the Pod and Thomas in the back but one day Ben does end up attacking Thomas and Thomas ends up killing him. 

Since they run more on instincts and animalistic feelings, Thomas did not really feel bad at first because he did it in order to survive but he soon realizes how sad the pod is since he can feel their sadness. He decides to permanently stay in their pod and promises to protect them as a way to make amends 

In the beginning, Thomas does not have a good relationship with anyone in the Pod except for Chuck and Alby. With him and Chuck having a brotherly relationship and him and Alby having more of a stable one. Gally and him absolutely hated each other but over time they warmed up to each other. Newt, Minho, and Thomas had a distant relationship until Thomas ended up saving Minho from mermaid hunters, which caused him to earn trust from Minho, Newt, Frypan, and Winston. 

Sirens are very different from normal mermaids. They age the same but mature mentally faster than Mermaids. Their diets are very different with them being mostly carnivores while mermaids are omnivores. Mermaids are sort of okay with humans, they especially have soft spots for the human kids but Sirens won’t hesitate to kill one. They are more private about their species and do not let any humans near them unless a human somehow manages to earn their trust. Aris, Teresa, and Rachel are humans that Thomas tolerates but he doesn’t like it when they get too close. Mermaids can not survive without a Pod but Sirens can and they choose willily to join one if they want to, they just tend to do things on their own in the Pod and sometimes listen to the leader which is why it’s important they have a great relationship 

The characters do all act the same as they do in the book and movies, but with just a slight readjustment with their bio instincts. Thomas is still curious and oblivious but now he just has a little bit of animal instincts added to him, this applies to the rest of the characters

Free fee to add in your own headcanons or even make your own story of this. I probably won’t talk about this Au again unless someone asks me too and don’t mind the big ass among us, I just like adding them in my drawings sometimes. 

(p.s. Sorry for any spelling errors or if I just straight up don't make sense. I have dyslexia and I try my best to correct my errors)