anon who suggested demon beastzai here again !! meeting demon beastzai probably consists of months withstanding very very strange things happening wherever you go and even more so within your house. from lights flashing off and on, scratch marks on the wall, your stuff going missing, things being misplaced…. im not sure how reader and demon beastzai would even meet but i would think after you did, he got hooked on you immediately therefore the weird things start happening
it isnt until he actually makes himself FULLY known to you does he start showing up in front of you with little to no regards of your comfort, im sorry you just have a new roommate !! no takesies backsies !! he lingers behind you randomly , wrapping his arms around him and dotes on you. sure maybe he messes you with and maybe it’s a lot but it’s nothing too serious!!! yet. yet at least. unless youre so insistent on getting rid of him but you dont really have the power to actually do so, so he plays with you lightly <3
oh and he totally watches you take baths or showers, he’s like a cat he will follow you into every room. and let him nuzzle you while he holds you in bed wont you? no he won’t let you outside that much anymore, if you need something he can just order someone to get it for you ! he has a lot of power you know ? why would you need to go outside without him? if you really want to that badly, he supposes he could shapeshift into a human form but he’d really rather stay at home with you.
also going back to what someone said abt the demons faking that they have heats/ruts YOU CANNOT TELL ME THAT DOES NOT HAVE DEMON BEASTZAI ALL OVER IT. HE WOULD DEFINITELY DO THIS…. just hearing him whine while he buries his face into your neck and he presses against you, practically humping you and hes just complaining about how painful this rut is for him !!! even the strongest demons have their weaknesses, youre the only person who can help him :(( he cant go to anyone else
I also don't know how demon Beastzai would come around to be honest.... he just pops up and decides to stay. The closest explanation I can come up with is he's some sort of lord/ruler in the underworld? That could serve as substitute for the PM, but I'm not too concerned about logistics I want the vibes. Somehow, someway, Beastzai decides he's your new roommate and now refuses to leave. Even worse if you live in a little studio apartment, because it's impossible to keep your distance or have any personal space. He'll sit with you, sneak into your bed, poke his head into the bathroom while you're showering, and nothing you do or say will stop him.
Beastzai also refuses to let you leave! He can magic groceries and takeout into your hands, you can shop and order stuff online, why would you ever have to step foot outside? If you complain about being confined to such a small space he'll offer to bring you back home with him, but of course that "home" isn't anywhere in this plane of existence. If you insist on going outside he shapeshifts into a hauntingly beautiful man, his dark fur turning into a dark coat, claws turning into long, nimble fingers. If the light hits his eye just right you swear it looks red. And he holds your hand everywhere you go, of course. Doctors' office, grocery store, he'll even hang off your arm while you're trying to work, exercise, go to class... And he'll be whining constantly about going back inside. He's got a million excuses: pollen, the sun hurts his eyes, he doesn't like getting wet, it's too hot, it's too cold, people make him anxious... It's neverending. And god forbid you have to take public transport, he'll hug you from behind, rest his chin on your shoulder, and glower at anyone who tries to stand close to you until they get off.
As for how he'd look, I have a few ideas but he's mostly the same as regular Demonzai. Big, tall, not buff just broad shouldered, horns and fangs and big claws. Lots of dark brown/black fur especially on his stomach and back. Maybe slit pupils? Yellow or red eyes, perhaps a forked tongue. He might even have backwards knees like animals do, generally I imagine him as part goat with some monster features added. If you strip him naked there won't be a lot of difference between Beast Demonzai and normal Demonzai imo, maybe a few more scars on Beastzai.
Also OUGJSVJDKVJD YES HE FAKES HIS RUTS ALL THE TIMEEEE he gets extra clingy and puts his hands all over you and whines pathetically, humping your leg and crying about how painful it is, walking naked around the house because he's "overheating" and conveniently letting you see every inch of him... And much like regular Demonzai he's not opposed to straight up holding you down and taking what he wants, or using you in your sleep.