The cafeteria if filled with loud noises, your voice shouting profanities to another demon specifically.
Everyone listening to the argument feels like they're stomach is about to burst out of nervousness because "What if Lucifer randomly comes in and put all of us is detention because we just stood by and didn't do anything to stop the fight?!"
And he did.
But what surprised them is that he didn't shout or anything, he just stood there for a few second and scanned the crowd looking for one of his brothers.
Spotted Mammon and came close to him before whispering something among themselves.
And then he just stood there
Doing nothing
As if it's just fucking okay to let a human, the exchange student at that, to scream and curse a demon because he won't cooperate into this project.
And when the demon started cursing back at you, the rules are suddenly so strict as if cussing will cause the end of the 8 rings of hell.
The demon is sent to detention, removed from the group, suspended, and many more.
And who knows? Maybe you pulled just a few strings to have that demon expelled.
But what the citizens sure know is that they never saw anyone again after talking to MC like that.
MAMMON
It was cute
Mammon would do anything for you, no matter how big or small it is.
One day, Mammon was spotted running around the halls of RAD.
Looking like he's getting chased by Lucifer, again.
But surprisingly, he's not.
He's just running around the school fetching your fan, notebooks, bag, pens, water or some snacks.
One time, you two were put in a group for this project and were talking about it with your other group mates.
Then you hit him with a "Mammon, I left my notebook on my desk in the potions class, can you fetch it for me?"
With just a blink of an eye, Mammon who was leaning on your shoulder just a few minutes ago is gone.
And with another blink of an eye he's there again with your notebook on his hands then he's back to leaning on your shoulder again as if he didn't just go to the other side of the school for a notebook.
LEVIATHAN
He's introverted
He won't go out his room if it's just for some lame party
I also headcanons for him to be the most unseen brother
Or like him having the smallest amount of photo and information online because he just won't go out.
Yeah, he won't go out if it's just some small, lame party but if Diavolo hosts it, what exactly can he do?
"Do you think the avatar of envy will attend this party?"
"Ha! No way... Lord Leviathan won't attend small parties or gatherings like these unless Lord Diavolo hosts it himself."
"Lord Leviathan really has a high standard when it comes to gatherings..."
And then poof
He's there
Beside you
A happy go lucky sheep beside a gloomy snake
What a match
And if you ask him why he would attend such gatherings when it's totally not even his style he would just go like "MC."
"What can I do? MC really wants to see the fireworks display."
"MC wants me to escort them."
So they got the hint on how to make Levi attend gatherings, either have Diavolo host it or invite MC too.
SATAN
He's angry
But not angry enough to yell when MC is around
Man's can go from 👹 to ☺️ real quick as soon as he felt MC's prescense
He doesn't know why too, but whenever he yell while you're around he thinks he'll fall out of favor
"WELL MAYBE IF YOU'RE SO PERFECT THEN WHY DON'T YOU GO AROUND WHILE YOU HAVE YOUR HEAD FAR UP YOUR ASS- Oh, Hi MC? How are you?"
He'll talk so sweet in front you and then when you turn around you can see some veins popping out of his neck and forehead.
And if he can't really handle it and went berserk in your prescense another scary yet amazing thing you can is to put your hand on his body.
Shoulder, head, neck, wrist, arm, wherever it is.
Just pat him or link your arms with him and he will start to calm down.
ASMODEUS
People headcanon him to like it when you're obsessed with him but I think he's more obsessed to you.
Like he's down bad
You can do anything and he'll literally fawn all over it
"Look at the way they run their hands through their hair!"
"Look at how they work!"
"The way they hold that fork is so graceful~"
Literally, you're the only person that comes to his mind when someone said pretty
Except for himself of course
But I swear, whenever someone caught him staring at you the atmosphere gets so thick
You don't even know why but the atmosphere is heavy and the air suddenly smells so sweet
And those heart in his eyes, the way his pupils dilate
Yeah, you have this man worshipping you alongside himself
BEELZEBUB
Other than the fact that he's actually willing to share his food with you
He's willing to help you in any physical works
Like lifting up things, carrying your stuffs and sometimes even running errands for you
I mean, he actually doesn't do it a lot because Lucifer actually asks Mammon for this stuff because the things Lucifer needs to be done is a little...
Shady?
And he doesn't want to taint Beel's innocence.
So now since you're already a part of the student council when Lucifer needs to have something important finished but it requires physical work.
You and Beel will be partnered
And he doesn't have anything against it either
He likes it so much when you command him to do something actually
I mean, he's tall and buff but Lucifer won't ask him to do anything that includes hard labor except taking care of Belphegor
So you actually helping him make use of all those muscles made him feel a tinge of happiness
He feels like he's actually of use :)
BELPHEGOR
This little brat
He would kill for you and he means it
He's not scared to spill blood on broad daylight as long as it's for you
Someone bothered you? Dead
Oh this person annoyed you? Taken care of
Aw~ He told you you're cute and asked you out on a date? That's sweet! Dead.
He's just like that
He won't tolerate anyone who dared disrespect you
And Lucifer won't even put a stop into this
"I mean, Devildom is quite overpopulated and we don't want anyone disrespecting Lord Diavolo's plan on bringing the three realms together now." Is what he reasons everytime.
Oh, he also wakes up on command as long as it's you.
Lucifer and his brothers could be shaking him like he's dead and he won't even bother to open his eyes
But if you just pulled a "Belphie? Good morning..." Oh dear, he's wide awake and clinging to you.
I have long wanted to write a headcanon where high demons have lesser forms, so take a walk with me on this:
Imagine that the brothers are fighting with each other and one of them takes a serious hit, like, somebody's left hook got them right in the jaw and it was brutal. They fall to the ground, stone cold, and... just. Poof into a tiny little critter. Like a verison of their familiar. And they can't retake human form until they've rested and healed their wounds.
I'm doing that.
Lucifer becomes this fat-ass, little peacock. He's like one of those rotund Chocobo from the Final Fantasy universe, you just want to pick him up and squeeze him but he's slightly too heavy for that. His feathers are black, save for the tail which have black, red, blue, and green markings. If something makes him "Poof!" then he'll hide away in the Castle because he refuses to let his brothers ever see him in that state. MC can visit him, though, and he'll coo and get all fluffy whenever they pet his tummy.
Mammon turns into a three-eyed raven, but not fat like Luci. He basically becomes a bigger verison of one of his familiars, he's about the size of an eagle. For being the second strongest he gets "Poof!-ed" rather often because he gets caught up in so many fights. Most of the time, he's just a bystander then some stray shot hits him and suddenly he's squawking everybody's ear off! Hilariously, he's arguably smarter in this form so when he's stuck as a bird, his grades actually improve (if anyone can read his actual chicken scratch penmanship).
Levi becomes a snake. Duh. He has similar markings along his back to the colorful scales on his neck in his demon form. He isn't even the length of your average scarf, so MC can drape him behind their neck easily and he doesn't get in the way. He's absolutely MISERABLE like this, though, because he has no hands to play games with. He can get extra clingy to people if he's feeling cold, but MC has to invite him to share their body heat because he's too shy to signal what he wants.
As much as Satan would love to be a cat, he becomes a little unicorn (Sorry, I didn't make the lore). He's about the size of one of those miniature horses, but don't be fooled. He will snap your kneecaps and he's at perfect height to rear-kick his brothers right in the crotch. His coat is black but his tail, mane, and the underside of his horn are all his signature green. If he every gets "Poof!-ed!" he's big mad, so he'll spend the entire time trying to kick and spear his brothers so they have to suffer along with him. He's the cause of a lot of chain "Poof!-ings."
Asmo becomes the smallest, cutest scorpion you ever did see. Well, as cute as scorpions can be. His whole body becomes hot pink and he has the biggest widdle eyes (think those jumping spiders who wear raindrops on their heads type energy). He's also venomous as all hell, so his brothers HAVE to make sure that they continously call him "small, cute, and adorable" lest they suffer a week's worth of paralytic toxin. He can fit the palm of a hand and makes MC tie a little bow around his tail so he doesn't feel too bad about being under-dressed.
Beel, unfortunately, becomes a fly. A big fly (by fly standards), but a fly nonetheless. You wouldn't even know that it's him if he weren't traffic cone orange. Literally everyone panics when he gets "Poof!-ed" because it would only take some bozo with a swatter to put an end to the sweetest brother... Belphie never lets Beel out of his sight and even has a tiny leash so he can keep track of him if they have to go out. He's a lot easier to feed like this, but everyone has to resist that automatic urge to smack him away from their dinner plates.
Belphie ironically has the largest lesser form out of his brothers. He's a cow, more specifically a bull, but there's nothing special about him aside from the navy fur. He is a full grown bull and he loves to lord it over the others if they all get "Poof-ed!" at once. Also, good luck getting him to do ANYTHING in this form. He is a bull. If he does not want to move, he will not be moving. Not even Beel can carry him like this. He's the only brother who doesn't mind getting "Poof-ed!" all that much because of it.
Mammon: Wait, wait, wait. So you're tellin' me that if Lucifer had been nicer, you would've never tried goin' up in the attic a second time?
MC: Yeah.
Levi: Wait, what? How…?
MC: Alright, look. There were two reasons why I wanted to go into the attic. One: I was hearing Belphie's voice from there asking for help, and two: Lou was acting suspicious as fuck about it with the whole threatening me and shit.
Lucifer: I-
MC: Shh, let me explain!
Lucifer: …
Belphie: Pff…
Satan: So what, you're saying that if Lucifer hadn't acted the way he did, you would've just given up? No trying to go into the attic, no suspicion, you would've just ignored Belphie's voice and went on with your day?
MC: Absolutely. I mean, think about it: I had just gotten here, and someone not wanting a stranger to go into certain parts of their house is kinda reasonable. And like I said, it wasn't the "not letting me go there" thing that made me want to go there, it was the suspicious behavior!
Because again, you threatened me and just started being an overall dick after you caught me trying to go upstairs.
Lucifer: MC-
MC: But I understand your reasons, you were worried, wanted to protect your family, and bla-bla-bla. Don't worry, it's fine. We've come a long way, I love you, you love me, and there's that. But going back to the topic…
Asmo: 🤭
Lucifer: 👿
Asmo: 😦🤐
MC: So the point is, you catch me going to the attic, and you threaten to kill me if I try doing it again. You don't try to explain, don't try to convince me I shouldn't go there, you just go: "I have this tea that will put you to endless sleep, muahahahaha."
All brothers (except Lucifer): *try not to laugh*
MC: And in my head, I go: "Bet. Imma see what the fuck's up there, and you old man, you ain't stopping me."
Asmo, Beel & Mammon: 😨😦😳
Belphie & Satan: *wheezing in silence*
Lucifer: *glares at them*
MC: But that could've been prevented! Like, if you hadn't threatened me, and tried to explain why I shouldn't go there in the first place-
Lucifer: I couldn't tell you the truth.
MC: Well, you could've come up with anything! Because remember, I had just dropped here, in literal fucking hell. So you could've told me literally ANYTHING and I would've believed you. Like, you could've just told me the room was cursed by an evil spirit or something. Because I'd hear that and go: "Alright, have a nice day. I'm never stepping foot on these stairs again."
Beel: Pff...
MC: But nooo, Mr. Pride had to go: "I won't give you ANY explanation, and I will KILL you if you try going there again." And that combined with the strange voice asking for help? It did not give you a great look, I gotta say...
All brothers (except Lucifer): *already laughing their ass off at this point*
So! MC in the manga is a sheep (get turn into a sheep because they aren’t familiar with the magic? Idk). I was just wondering that at the end of the exchange programme how would the boys react to Mc’s “true form”
This is such an interesting thing to write 🖤
By the way, this is another request stuck in my drafts, I promise I'll try to make up for it and post more :')
Lucifer: .... What happened? *raising an eyebrow at the two of you*
Mc: well... Levi-
Levi: HE FUCKING CHEATED ON MEEE *cries harder*
Lucifer: he? I didn't know you have a boyfrien-
Mc: it's not a boyfriend lucifer
Lucifer: then what is it?
Mc: he's Levi gaming buddy, apparently he found a new much more 'good' gaming buddy so he played with the new game buddy while still with Levi, and couple hours earlier Levi just got dumped by him.
Lucifer: ....... Where's mammon? *Levi cries and wails can be heard in the background*
Mc: well as soon as he found out what that demon did he immediately flies to go to they're place
Lucifer: for what?
Mc: .... To kill him
Lucifer: *dialed mammon immediately* mammon do not kill him
Lucifer: no, I said do not kill him, don't drop him yet, we need to torture him first
Lucifer: good, I'll tell Satan that he can have a stress relief toy, yes bring him here
Mc: ... This is why I love them (the brothers) *smiles*
Mc: Levi... Do you want to watch the whole tsl from season one to three?
Levi: *sniff* four?
Mc: ok *smiles* four season, let's go, help me get the popcorn