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Serendipity Headcannons; Mattheo Riddle

series masterlist

A glimpse into our main boy's life leading up to sixth year (where Serendipity kicks off) – eventually going to do them for each character (the ones who are a constant in the series), except meadow since that's more reader-centric but let me know who i should do next (this is me putting off writing chapter 17 because its making me want to rip out my hair)

It actually ended up being so long (i got carried away) that i'll have to do a separate post for the nsfw😏 hcs that i also wrote down - if that's something that people want to see of course

warning(s): cannonical violence, mentions of parental death, menions of torture and abuse (tried to make this as mild as possible), allusions to self harm (literally one bullet point), mentions of blood supremacy/cannonical pureblood madness, mentions of alcohol consumption/drug use, mentions of being sick (sorry fellow emetaphobes), allusions to an ED

Obviously he's Voldemort's son (its a known fact; when his name was called shortly after Harry's during the Sorting Ceremony, people immediately began to fear him for his last name – avoided him in corridors and older students were horrible to him)

His mother died when he was born, so he never got to meet her. But she had loved Tom Riddle with all her heart, despite knowing what kind of person he was (I like the tom hughes fancast for an older version of him – TikTok editors have me influenced)

When he failed to kill baby Harry, Theodore Nott's mum took it upon herself to care for Mattheo (who was only several months older than Harry at the time) – she was close friends with Matt's mum

They may not be related by blood, but Matt considers Theo to be his brother as well as his best friend

Mattheo's childhood (up until he was eight) was relatively acquiescent, but obviously being the heir to the Dark Lord comes with its own traumas – he was plagued with nightmares he swears were real conversations with his father

When Theo's mum died, his father wasn't the nicest to either of the boys; they both grew to resent him – the man either ignored them, shouted at them or beat them senselessly (to build character)

They had a Governess in the years after Theo's mum died, so that they'd be well ahead of their peers once they got to Hogwarts - also a way to keep them out of Theo Nott Senior's way

During his sorting, the hat immediately placed him in Slytherin, but it wasn't as quick to choose, like it was with Draco or Blaise.

Harry had unconsciously made him public enemy number one when he found out who he was (I mean his dad did kill Harry's parents so) as well as Draco and co

Mattheo doesn't believe in the blood supremacy that is spouted around pureblood families – has never used 'mudblood' to insult anyone (draco take notes fr) – but thats only due to theo's mother and the way she raised her boys – also it would be so hypocritical because he's a halfblood (i think, idk the twisted lore of purebloods too deeply)

Professor Quirrell took a particular interest towards Mattheo (his dad was literally playing house on the back of the guys head)

He found out that Quirrell was Voldemort (?) pretty quickly when the Dark Mark was burned onto his left forearm – something that continuously happened in his nightmares so he thought he was in one when it happened

Partly why he didn't say anything – he was also weary that no one would believe him

He tried everything to get it off his skin – burning, scratching, spelling, even carving it out, but nothing worked. The Dark Mark was engraved onto his arm like it had buried itself within the very cell structure of his skin

He didn't gain as much attention as Harry did in first year. He went practically under the rader after the first couple of months, only interacting with his small group of friends (Theo, Draco, Blaise, Enzo and Pansy) and competing for the top academic spot in class – when Theo's father found out that both boys were being beaten for first place by a muggleborn (go Hermione!), he used the cruciatus curse on both of them - moreso on Theo :(

Second year was a completely different story however

When the Chamber of Secrets opened, people whispered that he could be the heir of Slytherin (because his father is literally Voldemort so technically they weren't wrong) and he didn't go as unnoticed as before

He developed a thick skin towards the insults and returned them with steely looks that sent people scurrying the other way

He began physically fighting some people when his restraint snapped at times though – he didn't have a way to relieve the tension from all the agression at this point

The only people who spoke to him with no fear were his friends

When the first student was petrified, he was brought into Dumbledore's office for questioning

During the dueling session, he watched in awe as Harry spoke to the snake but didn't dare say a word

He was the only one in his group that didn't bad mouth Harry at this time or call him the 'heir of Slytherin'

He's actually really smart (not at Ancient Runes though lol) and is among one of Professor Flitwick's favourite students

When Harry and Ron posed as Crabbe and Goyle you (Meadow) had posed as Pansy and he had thought it was strange to see her with the two of them, but she had a small crush on Draco in first and second year so he brushed it off as her trying to impress his friend

But he knew it wasn't her when Draco had mentioned Hermione (calling her a mudblood) and 'Pansy' had gone deathly still

He's been skilled at Occlimency for as long as he can remember, as has Theo. But Mattheo has a certain affinity (he calls it a curse) for hearing people thoughts without even uttering the spell – also why he's so good at preventing people like Dumbledore from using it on him

Wasn't aware of his father's diary being used to lure Harry to the Chamber of Secrets, but at one point he heard the whispers in the pipes and vehemently ignored it until it eventually stopped (big mistake, cus voldy holds grudges very well)

Once Ginny was rescued from the Chamber, he felt incredibly guilty even though he literally had no control of the situation – sent her an 'anonymous' gift basket as an apology (he knew it would never make up for what happened to her, but he hoped it would at least make her smile) – it did, she thought it was a gift from dumbledore though

One of the only times he was even a little kind to the Golden Trio and their friends

The summer after second year was hellish for him and Theo

The basilisk was obviously meant to kill Harry so Theo Nott Senior was angry that his master's big plan had failed (2 years running🤝)

Third year was more mild than the last (thank God, honestly)

Mattheo had made it onto the quidditch team now that half of them had left the year before

He's a beater and proud of it – lets out all that pent up agression on the field, which makes him one of the best in his house (dare i say whole school🤭)

Quidditch became his whole personality basically (he's a teenage boy duh – it's like the football obsessed idiots in the pub levels) and he came to love the attention it brought him – he was starting to be noticed by girls outside Slytherin and making enemies with the rival players

He decided then that he wanted to play quidditch professionally in the future – he would not be caught dead behind a desk in the Ministry (they probably wouldn't hire hom anyway, simply because he's a Riddle)

Because he was on the team, he was invited to more parties which he also enjoyed – the man can drink!

But he wasn't one to jump around like a madman like some people he saw at the parties. He and his friends (those on the team – Theo, Blaise and Draco) would sit around the sofas and play drinking games with others who were sat down – including you and some of your housemates at times – but never the Gryffindors

Sirius Black was on the loose which took the pressure of being Tom Riddle's son off his shoulders somewhat – no one actually dared to fuck with Mattheo now that he was a beater either

Buckbeak took a liking to him, surprisingly, as did the thestrals that only he, Theo and so few others could see

The dementors affected him as much as they affected Harry – he could hear his own mother's cries

During the boggart lesson, he was apprehensive of what he would see – would he see what he sees in his most horrifying nightmares? Or would it be something as trivial as a grindilow or something?

Safe to say he was glad that Professor Lupin stopped the lesson after Harry's turned into the dementor

Speaking of dementors, one of the only spells he cannot cast is the Patronus Charm – even his happiest memories are not strong enough to envoke the magic

People thought he helped Sirius into the castle at one point (absurd, i know)

He and Harry got into some arguments at times – Mattheo liked to provoke him for the fun of it, mostly so that competition on the quidditch field was filled with extra tension, but also because Harry and Ron are dickheads who like to talk shit about him and his friends (hypocrites because the Slytherins literally do the same thing lol)

This is the point where you're on his radar a bit more frequently – you, Ron and Hermione went to Hogsmeade a lot and were frequently in the same places as Mattheo and his friends

He does not like you at all, partly for the fact that you follow Harry and Dumbledore so blindly but also – you are one of the reasons he and theo get so much stick at home, along with hermione being top of the class, you are as well so he grows to resent you a little

He's always there when you're yelling at anyone who says something against your friends (usually Crabbe or Goyle – our mortal enemies fr)

When Sirius escaped the dementors people genuinely thought he helped (again, absurd i know)

Moving onto fourth year...he went to the Quidditch World Cup with Theo and Nott Senior disappeared after the match ended and festivities began

We all know what happened but when the Dark Mark appeared in the sky, Theo, Draco and Mattheo all looked at it in absolute horror, having heard the harrowing stories first hand from their families

Mattheo had a panic attack at the thought of his father returning – after the run in with him in first year, he's been certain that Voldemort isn't really dead, and this confirms it for him (because why the fuck would his father's mark appear out of nowhere?)

Because of that, the school year is off to a great start

He gets into fights left, right and centre – especially since quidditch has been cancelled in favour of hosting the Triwizard Tournament (i've obviously aged up the characters but lets pretend the age limit still exists in some capacity)

The Durmstrang students practically worshipped the ground he walked on – which was ego boosting to start with, but Mattheo quickly grew irritated by their constant infatuation with him – especially Karkaroff who always compared him to the great Tom Riddle or the 'Dark Lord' interchangeably

Whenever Professor Moody stared at him for too long, he got an odd sensation on his left forearm, where the mark sits, like spiders were scurrying and crawling around – he decides after the very first DADA lesson (unforgivable curses) that he did not like this professor.

There was just something off about him, but Mattheo couldn't quite figure out what – foolishly tried Occlimency but obviously it didn't work on the most infamous auror

Wasn't even surprised when Harry's name came out of the Goblet – he is coined 'Saint Potter' by the friendgroup (started of course by Draco)

He and Theo snuck out to the forbidden forest to see the dragons up close before the first task – almost got caught by Charlie Weasley, had Hagrid and Harry not showed up with Madame Maxine mere moments before he could spot them

He took a random girl from Beauxbatons to the Yule Ball because he did not want to deal with the hassle of Hogwarts gossip – but everyone gossiped about it anyway (busybodies)

Rumours went around about the two of them (you know like how Snape caught two people in the carriage🤭)

At this point, you were just his arch nemesis' best friend so you were not fully on his radar past sneering comments and jibes, but a small part of him can admit that you looked beautiful in your glittering dress (think Feyre starfall dress vibes)

The rest of the year went by uneventfully – he got on with his school work and remained one of the top of class except in Ancient Runes which theo tried to tutor him in....unsuccessfully

In the months leading up to the third task, Mattheo noticed Moody's skittish behaviour (also Karkaroff and weirdly...Snape) especially after Crouch was found murdered in the Forbidden Forest after the second task

On the day of the first task, he had the worst gut feeling he's ever felt – bigger than the day he found out that his surrogate mother had died

Sitting in the stands with his friends, near the back of the stadium, his arm begins to burn so painfully that he has to fight physically crying out at the crippling pain (Voldemort just got resurrected as a noseless alien)

Excuses himself to his friends' utter confusion and concern – Theo stops Pansy from running after him, letting him have space, somehow just knowing what Matt's sudden departure meant (he saw Mattheo cradle his left arm while he walked away)

Just before Mattheo walks through the exit, Harry apparates back with the trophy (portkey) and Cedric's dead body beneath him screaming that "Voldemort's back!"

He couldn't hold back the contents of his stomach at the statement because he knew it was true. He just knew it deep in his bones.

He had to hide behind the bleachers of the quidditch pitch while everyone was stampeding to leave, where he just sobbed and sobbed because he knew then what his future would be.

Theo found him an hour later and together they mourned for the future Mattheo had desperately always wanted

That summer was the worst he's ever experienced to date.

He met this snake-like version of his father, his only other memories being of a handsome man (Tom Hughes vibes) not whatever this thing was.

His father thanked Theo Nott Senior personally for taking such good care of his heir – this was such an ego boost for that horrid man

Mattheo was tortured into the perfect soldier that summer – tasked with training other Slytherins/purebloods into the regime

Its not very discernable but if his hands are still for long enough, they begin to shake unconsciously due to just how many times Voldemort used the cruciatus curse on him

His nightmares had become a reality that summer – he no longer slept, and only ate when Draco had to force him to

There was one silver lining at least

No one believed Harry Potter.

So Voldemort's army grew exponentially in secret, as did their knowledge of certain prophecies

We know that Professor Trelawney had the vision but Voldemort has a seer of his own – who made him aware of the order being in possession of a siphon but not able to say who it is (its meadow of course🤪🤪🤪)

His fifth year marked the start of the war, even if the otherside didn't know it just yet

At school, Harry started many explosive arguments with him, that he admittedly fed into a little bit out of pure amusement

His stoic facade was ever present this year. Not an expression painted his handsome face in the public eye. Rarely did anyone catch a glimmer of joy in those onyx eyes.

It was around this time, when he discovered that Harry was being taught Occlimency that you were doing some studying of your own

He heard the soft whisper of your thoughts in his head – a pleasant sound – mumbling little bits and pieces about the art, as if you were revising them over and over like a broken record

He knew you were Theo's patrol partner because Theo would not stop complaining about having to deal with one of Saint Potter's loyal followers (the two of you did not speak for 5 whole patrol sessions – lets say between September and November)

Thats when the idea sprang

Admittedly it started out as a way to satisfy his curiosity

He wanted to know why you were learning Occlimency and actually doing surprisingly well, despite not having someone to actively practice it on/with you, while Potter was not taking it seriously at all

So he asked Theo to try and befriend you – when asked why, he explained that he was curious and wanted to know if he hunch he had was right – his gut feelings are almost never wrong

Theo begins his task of slowly befriending you and relaying anything remotely important to Mattheo – no progress at first, until the two of you happen to bond over your hatred for the new DADA professor

He joins the Inquisitorial Squad because Theo's father wanted him to, and by extension said that the Dark Lord wanted his son to set an example too (lets not forget, in his prime Tom was literally the smartest in the school – was definitely head boy as well as an academic weapon)

This is how he finds out what Umbridge's detentions truly entailed

Speaking of Umbridge (she deserves her own tw actually), she had shown particular favouritism towards Mattheo and his friends, to anyone who was against Harry, really – never gave them detentions and let them off easily, even defended Mattheo's honour against Harry's 'heinous' accusations

But back to the detentions – both he and Theo found out about the blood quill around the same time

He was waiting for Theo to finish patrols so they could go smoke in the Astronomy Tower, when he overheard Umbridge talking to the two of you

Well actually she was talking to you – because apparently it was now against the rules for prefects to walk around past curfew (even though thats their literal role?) and she gave you a detention for it

When you asked why in Merlin's name Theo wasn't being treated the same, she said it's because he's on the Inquisitorial Squad and was therefore exempt from her detentions

You had detention the next day and did not show up to your next few patrols, but Mattheo saw the hints of a glamour covering your non-dominant hand (he would know because he's had a glamour over his scarred forearm for years)

Theo told him that you refused to admit that something was wrong - you hadn't even told your friends about whatever was bothering you

They found out by chance – a first year that had gotten lost was cradling their hand and the boys saw the words of the boy's own scrawl etched harshly into the flesh of his hand

When Matt was observing you in the library one day (happenstance, he's not a stalker lol), he was deducing how far along you were with Occlimency but found that you winced and held your head when he actively tried to enter your mind – not good for how long you'd been teaching yourself the art

So he gets Theo to talk to you mentally and the first time it happens is actually comical – you drop the contents of your potions incredients onto the floor out of shock before you whack Theo across the head with your hardbacked potions textbook

That's really how the two of you became friends, your friendship with Pansy following soon after

Now you're slowly building up the tolerance for Occlimency with a little help from a friend

Leading up to Christmas, the mark burns wickedly against his skin at all hours of the day

Then Arthur Weasley is attacked and Mattheo is surprised that no Weasley has come to deck him in the face for simply being Voldemort's son

Obviously no one does because everyone (barring you and Hermione) have been swept away to 12 Grimmauld Place

After Christmas he does get decked – George sends a bludger his way that most definitely had the power to break his entire arm (and definitely a few ribs); after the abysmal Christmas break he's had, he's almost tempted to let it happen – but his beater instincts kick in and he's pelting the bludger and all its momentous energy towards one of Gryffindor's chasers instead

His Dark Mark burns every time his father fails to retrieve his and Harry's prophecy

He begins to suspect that you are the siphoner when you perform wandless magic like its a second nature during breakfast one morning (you're using your magic to flip through the pages of your book, while you leisurely sip coffee, probably awaiting Granger's arrival)

His suspicions are more than confirmed when your magic seems to literally pulse like your pulling more of it from the air – it's almost indiscernible, but if he paid attention, he could see the symphonic ripple of your magic and the Great Hall's magic mingling in the air (and he knows Dumbledore can see it too)

He explains this to Theo without telling him so much that'll get him involved with what knowing this will mean for his brother

He passes all his O.W.Ls with a plethora Outstanding and Exceeds Expectations grades, except for Ancient Runes where he gets a mere Acceptable (which somehow still allows him to retake the class in his N.E.W.Ts options, funnily enough)

What's not funny is Voldemort's reaction to this anomaly of a result :(

Lets rewind to june 18th (aka battle of department of mysteries; RIP Sirius Black you icon, you legend)

The DA have just been busted (like two weeks/a week prior to the date above) and you're all in detention writing out the line "I must not disobey the Ministry" over and over again – to the point where it has become a permanent scar that you see everyday

Exams are happening and Harry has just been delivered a vision by Voldemort (he just passed out in a DADA exam🫣)

Saint Potter and his band of followers try to break into Umbrige's office and fail exponentially

The Inquisitorial Squad catch you all in the act of guarding the corridor outside her office while Harry, Ron and Hermione try and contact Sirius

You're all trapped in the office and everyone (including the Inquisitorial Squad) is shocked when she goes to cast the cruciatus on Potter – internally Matt is cringing and fighting the instinctive flinch

"You can't do that! It's illegal!" Your defence of harry is ignored as Umbridge puts Fudge picture face down – Matt swears your eyes burn a violent indigo, but it's gone in a blink

Hermione and Harry end up taking her to where 'Dumbledore's secret weapon' is and you lot are now all stuck with the Inquisitorial Squad

Theo actually only holds you loosely, and he's the same with Ginny – not forcefully holding her, but also not allowing her to break free at the same time

Crabbe and Goyle take Ron's bate and eat the Puking Pastilles from the Weasley twins' personal collection and you all escape

Then the battle eventually takes place and everyone knows that Voldemort truly has returned

Now onto the current timeline of Serendipity!!

Mattheo decides over summer that he wants to help the otherside desperately

Especially because Draco is now a Death Eater

And Enzo and Theo are set to become Death Eaters the following Christmas – punishment for what happened during the battle in June

Proposes the idea that he teach you Occlimency in exchange for you helping them get out – the group agrees and Theo and Pansy set out to persude you to help

Roll on the Serendipity plot where he slowly begins to actually care about you (scary feelings; unknown territory)

He's never felt this strongly about someone before, not in the way he feels about you

At first he enjoyed how infuriated you became with him; he also despised how many questions you would ask (but that was your nature and he grew accustomed to it)

You're the only one whose ever called him Théo, after the death of Theo's mother, the name was as good as dead to him, until you started calling him it – he never wanted you to stop

The feelings you invoke in him are what finally allow him to produce a full patronus – when the majestic form of a Hippogriff bursts from the tip of his wand, swirling and spiralling at the thought of you, he let out a genuine laugh

He's so soft for you – his persona changes in the blink of an eye at times – from cruel and brooding to gentle and compassionate

His friends have never seen him happier – admittedly were surprised to learn of your relationship, but when they watched the way the two of you interacted after you'd become a pariah to your old friends, they understood.

Mattheo is so protective of all his friends, and somehow he's even more protective of you – he had wanted to incinerate Harry and Ron on the spot for how they'd made you feel, but knew you would never forgive him for it, despite how badly they'd hurt you

He'd burn the world down if it meant you'd be safe, especially because you had the one power that his father desired to have in his ever growing arsenal

Mattheo always has to be touching you in some way (he's a physical touch kind of guy), whether that be a hand on your thigh when you're seated; an arm wrapped around you as you walk; interlocking pinkies, etc. He just loves feeling you near him.

You're such a typical Slytherin/Ravenclaw couple – your intellect amazing him all the time, and he's no longer miffed that you always beat him for a spot at the top in class – his ambitions and adamant loyalty are something that you admire dearly, and hold close to your heart

You both know without having to voice it that your love is unconditional and eternal. Its a love as rare as your magic.

~∞~

taglist:

(striked out users are ones that i couldn't tag)

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