Still trying to figure out formatting lol! Forgive me if this looks like ass </3
Content warning: Some of Satan's sensory-seeking behaviours written here are self-destructive.
Alright gamers Satan and Levi are autistic
Also do I even need to say that Mammon has ADHD. Fucking look at him (affectionate)
Satan has “needs to wear socks at all times” sensory issues
Mammon has “cannot wear socks or I will explode” sensory issues
Levi and Satan infodumping back and forth!!
Satan canonically reads light novels so you KNOW he and Levi have hyperfixated on some of the same ones. If their hyperfixations overlap, they do not leave Satan’s room for days
There are exceptions, but Satan typically leans toward “sensory-seeking” while Levi is more “sensory-avoidant”
Satan picks at hangnails, eats super acidic/spicy foods until his mouth hurts, taps desks, and clicks pens
Levi cuts all the tags off his clothes, can’t STAND stuff on his hands, and will use loud music/games to drown out other sounds
Mammon, Levi and Satan can all understand each other’s trains of thought
For example, if Mammon’s mind jumps to something unrelated and he changes the subject, the other two will be like. Yeah no that makes sense. Proceed
Satan and Levi don’t mask as much around each other
Levi can’t help but smile when he sees Satan’s hands start to shake from excitement while talking about one of his novels
I said it in my last headcanon post (here) but Satan doesn’t stim that much because he doesn’t know it’s okay. Seeing Levi do it helps him get more comfortable and do it more often
They’re not afraid to be honest and end conversations. Stuff like “I wanna go play games now. Talk later?” “Yeah sure have fun”
Levi uses tone indicators.
Satan doesn’t, but will send additional messages to clarify if he feels it’s necessary
Like, “Neutral,” or “Sarcasm ^”
Mammon denies it but finds them very helpful. It’s okay king I don’t get social cues either
Okay so we all know about my headcannon for Leviathan from Obey Me! having autism.
However...I have another headcannon for a different brother.
Beelzebub suffers from PTSD.
Oh yeah. ANGST...but also it makes a lot of sense.
When we first meet Beel, he's fairly grumpy/irritable. If I'm remembering correctly (which idk), I believe it's mentioned in game that Beel has a hard time sleeping, whether it's part of the story or text convos? I could be wrong but I feel like I remember this. He has flashbacks to the war, specifically losing Lilith, and we know he blames himself entirely for not being able to save both Belphie and Lilith.
All of these things can, in fact, be linked to Post Traumatic Stress Disorder. I wouldn't be surprised if all the brothers (excluding Satan who didn't exist at the time) had at least some degree of PTSD from the war, as often soldiers do have PTSD, but...I feel like Beel probably got the brunt of the disorder out of any of them.
So yah there's that headcannon. Leviathan is Autistic and Beelzebub has PTSD. At least that's how I personally imagine it.
More autistic levi ackerman please (I just love your headcanons❤️)
godspeed here we go
echolalia. usually under his breath but will absolutely repeat shit he has found hilarious or odd sayings that his brain latches onto. worst one as a child was “motherfucker” but a specifically dumbass way kenny said it. he thought that shit was prime humor
can’t control his facial responses like at all, he’s very bad at just grinning when he’s uncomfortable or benig scolded which does not help in the situation.
scratches at his skin when he’s uncomfortable or nervous, it’s something he does subconsciously and only people close to him really know he does it.
[with a deadpan voice] “wow that is so wild”
he didnt like playing with other kids as a child he usually just stuck closer to kenny or his mom while he still could.
things not being clean to an extent stress him the fuck out. if its filthy enough he will go nonverbal and freak it until its taken care of.
if you baby him he will kill you he’s autistic and an adult not autistic and an uwu precious irrational bean he will kill you.
nanaba insists on teaching him sign language to use when he’s nonverbal.
rocks back and forth, constantly taps his foot and bounces his leg, taps his fingers on things, flips his knife in and out of its sheath, and cleans his gear to stim.
INCREDIBLY self-indulgent as I haven't seen many OCD MC posts, and I needed some blorbo comfort.
Since OCD is often misrepresented in media, feel free to write in with other obsessions/etc if you feel so inclined. I'll try my best to write about them in another post :)
Please let me know if I missed any triggers in the tags!
Lucifer
He already knows.
Lucifer read up on you before you came. He knows what you struggle with and how it affects you, at least to some degree. He has to do Diavolo proud, and that includes staying on top of the exchange student’s wellbeing.
It's through living with you that really helps Lucifer get a better understanding of your triggers. After all, you can only get so much from reading the DSM-5
He sees you erase and rewrite your notes in class, over and over, until you’re completely behind on the lecture. He hovers silently in the doorway to the kitchen, watching you arrange the dishes symmetrically in the cupboard
He notices your hands, dry and cracked and sometimes bleeding from washing and sanitizing. He sees your midnight laundry runs after Mammon makes himself at home in your room, and how the bleach wipes disappear much faster than they did before. Lucifer watches your breathing quicken for all the wrong reasons when Asmo hangs off your arm.
He feels bad. It’s not like he can comfort you, with him being emotionally constipated and all. So he does the next best thing: problem solve.
Lucifer calls you to his study one night. You poke your head in, anticipating some sort of punishment— instead, he invites you to sit down for an honest conversation.
He doesn’t pry. As a private person, he understands keeping your emotions guarded. He does, however, make it clear he sees the toll they're taking on you.
He offers treatment— if you’re unmedicated, would you like to see someone for the anxiety? Would you benefit from therapy? He’d be happy to accompany you to the human world for your appointments, if that’s what you need.
Of course, lecturing his brothers about their behaviour is always on the table.
If none of those sound right, he finds himself staring at his gloves. He offers to update your wardrobe to something that better suits your needs— your jacket buttoning in the middle rather than off to one side, gloves to avoid direct touch, you name it. It’s yours.
“I want to help you, MC. Not out of pity, I simply don’t want to see a loved one in pain. Tell me what you need, and you’ll get it— you have my word.”
Mammon
Hoo boy.
Yeah, you’re gonna have to tell him, or ask Lucifer to tell him for you.
He’s a tactile guy. He’s always dragging you by the arm, yanking your jacket, ruffling your hair, and Devil knows what else.
Once you tell him, you’re probably gonna have to explain it a bit. It’s been a while since he’s paid attention to human emotions lol.
After that, he’s fantastic– well, he tries. Old habits die hard.
He recoils like he just touched a hot stove the second his fingers brush your skin. He always follows it up with a “Shit– sorry.”
If you’re particular about how you keep your room, again, he tries not to touch anything impulse control strikes again.
He will get it eventually, but for the first little while it’s probably best to hang out in his room.
If you don’t want the others to know, he’ll be even more protective than before when they get touchy. It’s hard to bite his tongue, but he’ll play it off like his usual possessiveness. He’s surprisingly good at keeping it a secret.
If you’re fine with them knowing, he will NOT hesitate to give them an earful. You’re his human, and nobody touches you unless you say it’s okay!
Doesn’t really understand the symmetry or perfection stuff, but hey, everyone’s different. He’ll wait for you if you have to bump your other shoulder against the doorframe until it’s even.
Overall very supportive. A little confused, but he’s got the spirit.
“…Huh. Well, as yer first, it’s still my job to take care of ya. That means this, too– so don’t think The Great Mammon’s gonna let it bother ya again, y’hear?”
Leviathan
Picks up on it a little, but doesn’t quite connect the dots
Not super familiar with human mental illnesses… He’d notice some of your unusual behaviours, but assume they’re just quirks.
Somehow fails to realize some of his quirks are because he’s neurodivergent too (it’s okay buddy we’ve all been there)
TOTALLY understands when you tell him. Well, kind of. At first he thinks you just don’t want him touching you, but after you explain it he’ll rant with you for hours. It’s not the same as the existential dread that comes from lending someone a pencil, but he gets being particular and nervous about your stuff.
He’ll get a special blanket for you to sit on while gaming in his room, only for your ass and therefore your germs. Will get you your own controller for the same reason (and maybe a matching one for himself teehee). No one else is allowed to touch your stuff, not even him— he’ll pick them up with gloves or a Kleenex if he needs to move them, even when you’re not around.
I don’t really have much more to say about him? Just tell him what you need him to do and he’ll do it without hesitation. Super respectful and understanding.
“Y’know… You don’t have to feel bad about it, okay? You’ll always be my Henry, so as long as we can still play games and stuff, I’m happy. And even if we can’t! I’ll do what I can to make you more comfortable, so you can always hide out in here if outside becomes too much… AARAARRUGHGHHUG DSJVNALVBSLKJN WHAT AM I SAYING that was so cringe forget I said anything ok bye”
Satan
Surprisingly, he doesn’t diagnose you the second you fall through the portal.
Instead, he watches you go about your day, and notices something’s off. Then he researches.
And then he does tests.
Not exactly the most empathetic guy, considering the fact that he, y’know, tortured people. So at first he’s not opposed to giving you a spit wash. He wants to see how you’ll react, and how much you can take.
Once you get closer, he catches on and starts acting according to what he thinks you need.
He’ll set cutlery aside for you when he does the dishes, he’ll leave your laundry alone when you forget it in the dryer (but nag you to come get it so he can swap out his clothes), et cetera.
If you open up to him about it, his curious nature takes hold. Hope you’re ready for an interrogation interview, because he’s got LOTS of questions.
Lets you vent to him and will bitch in return. He’s neurodivergent as fuck so likelihood is he gets irked by the same stuff
“MC, I’ve lived with my brothers for millennia. If you think some odd habits are going to bother me, you’re sorely mistaken. All that matters is that you’re happy. If you ever need anything, please come to me first. I’ll do everything in my power to help.”
Asmodeus
Doesn’t really get it, but he’ll go along and be respectful.
He’ll have a hard time not getting touchy at first, but like Mammon, he jerks away and apologizes once he catches himself.
Kicks himself every time because consent is suuuuper important to him (same with the other bros but. Y’know). Learns to keep his hands to himself pretty quick
Gives you tons of lotions, salves, and moisturizers to keep your hands in good shape if they get dry from washing
Will modify your spa days to make them more comfortable for you
Interrogates you about your clothing needs.
What textures work best for you?
Are there any patterns or cuts you can’t wear, or any you prefer?
Tell him everything. He’ll keep it in mind when dressing you up
Will not hesitate to tear someone to shreds if they say anything rude to you. He can pinpoint someone’s biggest insecurities in two seconds flat, and he will.
He might not understand, but that doesn’t stop him from loving and protecting you fiercely and unconditionally.
“Oh, hon, why didn’t you say so before! I’ll try to keep my hands to myself from now on. It’ll be hard, though, considering just how cute you are~!”
Beelzebub
This boy…
He loves his family. We know this.
Beel’s devoted quite a bit of time to learning about how his brothers’ brains work. He’s probably one of the most prepared and mindful of the bunch.
When you tell him, he accepts it without question.
He’ll prod for more information, if you’re willing to share, but gets it if you don’t wanna talk about it. If you do, he’ll listen for hours.
Loves to learn about you, period. OCD can be such a complex and significant piece of someone’s feelings and behaviour, so while he doesn’t like the parts that upset you, he’ll take in any information you give. He remembers every single word and puts it all to use. Just wants you to feel more at ease
Examples of things I think he’d do:
Put the dishes away symmetrically when it’s his turn to wash them, and push them into place if he notices they’ve shifted
Put takeout onto a clean plate for you so you don’t have to touch the container
If he sees any of your things laying about the house, he’ll use the dog poop maneuver to pick it up with a plastic bag and stick it in your room so no one else touches it
He’s just. Really thoughtful. And he loves you so much
“Alright, I think I get it. That must be hard. I’m here if you need to talk, okay?”
Belphegor
Doesn’t really notice lol. Unless you’re recoiling every time he goes to touch you, he’s clueless
Familiar with human mental illness, but may need a refresher. It’s been a while since he’s seen a human, or, y’know, been allowed outside
Will IMMEDIATELY stop touching you as soon as you set your boundaries. Belphie is very good at breaking habits and doesn’t really rely on one specific way of showing affection, so it is what it is
He’s bummed if you can’t nap with him, of course. It doesn’t take him long to find a workaround, though— he gives you two stuffed animals. You cuddle one until it smells like you, then give it to him and take the other one. He snuggles the first until it loses its “MC smell,” washes it, and gives it back to you. You give him the second one, and the cycle continues
Can’t really empathize, but he can offer a shoulder to cry on and a “that sucks” when you need it. Great listener until he falls asleep lmao
Belphie isn’t considerate in the way Beel is, but he’s still considerate. The difference is energy, really— he can’t really put in much effort, but he does remember what your triggers are and to be respectful. So while he won’t reorganize any shelves for you, he’ll remind his brothers of little things to make your life easier.
“Damn that’s crazy. Anyway”
“Oh, okay. That kind of makes sense. Is there… anything you want me to do?”
Autistic Levi Angst...kinda, I guess? This is him having a meltdown. It's angst/fluff/brotherly love.
Okay so from my personal experience, meltdowns often lead to full-on panic attacks. I'm writing Levi from the perspective of having very similar autistic traits to myself, as I relate very much to this man, and I can only speak for myself when it comes to autism. This isn't true for everyone with autism, nor should it be taken as a blanket statement.
Now with THAT out of the way...!
It was a good day. Leviathan was having a GOOD day. Everything was going well! He just got a new Ruri-Chan figurine, Mammon had paid him back (some of) his money, and he was super energized! He was excited, too...a convention in the human world, in Japan too! He was pumped! Only one problem...
See, when Levi goes to concerts, he always has to make sure that he either gets front row or balcony tickets. If he doesn't do so...well, it hasn't ended well in the past. But when he does that, it goes well and he has a good time! However, it's been a while since he's gone to a convention.
Conventions weren't anywhere as organized as concerts were. There weren't specific seats, it was just humans, demons, and angels alike all packed togrther to try and see everything that they'd want to see. Levi had rented a stall, and so it was okay at first...well, not really, but since he was already okay he could push through it with the help of a stim toy!
But then came the looks. And the judgemental stares. The whispers. Even more people packing into the venue like sardines...his head started swimming in frenzied panic. It was too much; too many people, too much noise, too much judgment.
And so he ran. He ran into a bathroom and holed himself up in a stall, rocking back and forth in an attempt to self soothe. He let out a sob, shakily using his hand to wipe away seemingly endless tears. The more he thought, the worse it got.
What were they thinking about me? Were they judging me? Of course they were, I shouldn't have expected any differently. I'm a stupid, smelly otaku, and that's all people will ever see me as...! I should have never come here.
His thoughts worsened as he began to completely break down and rake his nails through his skin, continuing to sob and shake. He couldn't do this, who was he kidding? He didn't deserve to be here. He didn't deserve to exist.
He got so lost in his own head that he didn't even notice as he was removed from the stall by Mammon and Beelzebub. He didn't notice their worried faces or their attempts to talk to him. There was only ringing in his ears as he focused on the negative, and how fried yet frenzied his brain was.
"...ey...!"
Finally, he processed something enough to look up through the violent ringing.
"Levi...! Hey!" Mammon exclaimed, gently cupping his little brothers face to make him focus.
"We're here, alright? Everythin' is gonna be okay...listen to my voice, okay? Can you talk?"
Levi tried to speak, but only a pained sob came out as he shook his head.
"Okay, that's okay. Just nod in response to my questions, okay? Do you wanna go home?"
Levi weakly nodded, continuing to cry and shake.
Beel frowned, hating to see his older brother like this.
"Do you want a hug...?" He gently asked, nervous that he would make things worse. However, a sigh of relief emitted from his mouth as Levi nodded, the firey-haired demon gently enveloping Levi in a hug.
"Everything is gonna be okay, we're here for you..." He gently muttered, Mammon nodding in agreement.
"We're gonna get you home. Focus on my voice and on breathing for right this second though. We're all gonna be okay."
After a while, Levi managed to calm his nerves enough to the point where he could stand and speak.
"...thank you..." He quietly muttered, sniffing.
"Hey, we're your brothers. We aren't gonna let you suffer..."
Levi looked at Mammon gratefully, a few stray tears still rolling down his cheeks.
"But...how did...?" Levi trailed off in confusion.
"We uh...followed you. I wanted to try some convention food and Mammon had a bad feeling, so I also got concerned for you...so we followed you up. I'm sorry...but I'm glad we did, now," Beel replied to his unspoken question, gently rubbing the shorter males back.
"I'll order us some takeout, okay? On me. No payback, no nothing....we can also watch some anime in your room, alright?" Mammon spoke up after a bit of silence.
"But...you don't like anime, Mammon...you don't have to hang out with a shitty otaku like me, I get that I-"
"Hey, stop it. If I didn't want to watch anime, I wouldn't have offered...and you're right, it's not my thing. But I know you like it, and right now..." A blush of embarrassment fell on the tan demon. "...I just want you to know that I care about ya. I care about your feelings, even if I don't act like it most of the time. I just want ya to feel okay, and safe, and loved. And if that's what I've gotta do to help you? I'm more than willing to do it."
Beel nodded. "I can ask Luke to make some treats from that new food anime you're obsessed with, too. He'll probably be willing to help out."
Levi managed to smile...even if they annoyed him and didn't really understand him sometimes...he knew his family loved him for how he was. And he loved them too.
-I feel like he would love Infinity Cubes, much like I do. They're satisfying, make nice little noises when you use them, they're just...so good lol
-I feel like he'd also like chewable necklaces. I dunno, maybe it'd be calming to him if he was playing a popular rage game?
-I don't feel like he'd like those silicone noodle things. Like...I don't think he'd know what to do with his hands with them lol they're just floppy??? And confusing??? He might like them because of his tail (and that's a big maybe) but other than that, I don't see him liking these ones.
-those liquid hourglass things? He'd love those. Boy would probably watch them for hours! He loves water (obviously, he sleeps in a tub and has a giant aquarium in his BEDROOM). He'd probably set the thing up near Henry's bowl and watch it with his pal.
-Mesh toy marble things...I think he would NOT like them. Why? Because mesh is a weird material, and we know he likes comfy things. I think he might have liked them at first, but then when part of the mesh comes undone and pokes him, he started not liking them anymore.
-Not a common stim, but he'd 1000000% have a squishy thing of one of his favorite characters to squeeze, especially if he was having a breakdown. Maybe he'd even get one of Henry, but knowing him, he'd be paranoid that he'd accidentally do it to the REAL Henry because of a prank from one of his brothers.
-spinner rings I think he'd like as well. They're simple and easy, and he could wear them in public and nobody would ever know! Asmo might even wear one sometimes to show support for his big brother, since it's jewelry and hard to tell that it's spinny.
-once again, not a stim toy, but you know those cute octopus things that have two sides, one happy and one unhappy? Those things below? He'd have one. He'd also have those communication bracelet things in case he got over stimulated.
-he'd also have one of those back and forth visual stim toys. The perpetual motion ones? These.
-overall, I think he'd really enjoy and appreciate stim toys! They can be super helpful...I really want a chewable necklace irl tbh 😂😅 but that's besides the point. I hope you guys enjoyed! Leave anything I might've missed in the comments if you want.
Headcannon- Autistic Levi meets my dumb autistic ass
-OK first we would totally stim together over things
-We would completely binge-watch TSL and other anime on repeat because...c'mon, it sounds awesome and you can't deny that-
-Try to make eachother feel better because we both have wicked bad self-esteem issues
-Would completely troll the other brothers...he'd have to help me how to figure out how to troll first though 😅
-Platonic (or not, either way) cuddles as long as we were both comfortable. I'm personally somewhat hug oriented when it comes to people I care about, but he isn't, so it would depend
-Man has a planetarium in his room, so of course we'd stargaze ALL THE TIME
-We'd totally swim together. He'd probably call me a Normie because he's literally a sea creature and I'm a human, of course I can't swim as good as you LEVI
-Probably playfully insult eachother and apologize right after. Or at least he would, I'm more sensitive than him
-Would talk about inconsistencies in shows
-Totally team up to get his damn money back from Mammon
-Be supportive of eachother since we're both antisocial
-overall, I just genuinely think we'd be good friends. We have a lot in common, so we'd get along great!
(Side note; should I make a new blog for my Obey Me! stuff? Because I really like writing headcannons for this Fandom, and all of the support you guys have given me so far is amazing! I would totally write scenarios n stuff if requested as well...let me know what you think either by reblogging with an answer, or just leaving it in the comments...thank you so much for your time!)
autistic levi having issues with clothes and fabrics but sporty-chic is now PRIME and now he doesn’t feel as self conscious wearing softer fabrics and compression leggings and its #relief
