Name: Inanis Ireoidaki
Hero Name: Void
Parent: Ochaco Uraraka (Closest on the list to the quirk I wanted, since both quirks are present in space-)
Age: 16
Gender: Male
Sexuality: Appears uninterested at first sight, but straight.
Appearance: Inanis is the most monochromatic person there is. There is not a spot on his body that has a colour that isn't white, black or anything inbetween. Well, except for one, but I'll describe that in a bit. He stands at 6'3ft tall, his hair is a dark grey tone, his skin a light-grey tone, and his eyes are completely vantablack, from the eyeball to the pupil and iris. Staring into his eyes would give the equivalent feeling of staring into an abyss. And you know what they say if you stare into an abyss long enough...
He has an average stature, thin and somewhat bulky. Every clothing he wears is devoid of colouring, even his school uniform. Outside of school, he wears a dark-grey long hooded coat that reaches down just below his knees, dark-grey pants, black shoes and a dark-grey shirt.
Now, the only colour on him is the very thing that makes him, him. That thing being his quirk, which physically manifests at his stomach. See, instead of a regular torso, his chest is split up into a top half and a bottom half. Each half as a thick metal plating on each end, and right inbetween these two metal halves is a black hole, an actual functioning black hole. This ties in with his quirk, which is explained below. The black hole looks like an average black hole; dark-purple aura, purple swirl that gets darker the more it moves inwards towards the center, which is all vantablack. To get an idea of how this looks, think of
Seth from Street Fighter, but with that Ying Yang replaced by a small black hole.
Hero Costume: Literally all Inanis does is change into his regular outfit and only adds dark-grey fingerless leather gloves, replaces his shoes with black combat boots and puts on sunglasses. That's it.
Personality: Just like his appearance displays, Inanis is pretty monotone when it comes to personality. He never expresses any emotion, and always just keeps a deadpan, calm/reserved expression on his face at all times and speaks with no emotion or personality, creepily similiar to a serial killer whose sanity had been broken. Despite being like this, he is very indifferent to the world, not caring about a bit about almost everything. He does value friends, family and potentially love, but is unable to visibly show this by expressing his face. He can give out encouraging words, admit feelings he never seems able to show and even laugh, but all only in the most monotone way. Even his voice is monotone, always staying on one tone and never changing frequency, which results in Inanis speaking like a robot.
Quirk: Dark Assimilation - Inanis can freely control the black hole that connects the two halves of his body, assuming it isn't covered by something. He can create a vacuum that draws in things into it. If inorganic matter is sucked into the blackhole, it will have no special effect other than making the black hole in itself bigger, which already happens with any kind of matter absorbed, regardless of inorganic, organic or living. If it absorbs too much matter without Inanis spitting some out of it again, it will cause it to be too big for Inanis' body to hold and absorb his two halves into it, which creates a paradox and makes it first turn blue, then flash rapidly inbetween light-blue and purple for 20 seconds before blowing up violently, imploding with the blast radius of an average round bomb.
Any organic matter absorbed into the black hole will allow Inanis to feast on it and heal from it, drawing the nutrients, vitamins and all the good stuff out of it and evaporizing all the bad stuff to boost Inanis' body, splitting the resulting minerals and nutrients between the two halves of his body. If it absorbs a living animal, Inanis can get one of its genetic advantages and weaknesses added to his own, up to three at once, up at which point any more animals absorbed will end up being stored in the black hole and replacing a random ability Inanis has previously absorbed. Now, if it absorbs someone with a quirk, it will allow Inanis to adapt the quirk of the user, taking on all the advantages but also weaknesses of the quirk. This only works if the black hole is big enough to absorb a being, and Inanis can only take on one quirk at a time, after which any more quirks absorbed will replace the one currently in use.
Inanis can also reverse the vacuuming effect of his black hole, spitting out all that has been absorbed with the same velocity and speed it had when it was absorbed. If he spits out any living creature, animal, human or quirk user, he will naturally lose the abilities gained from them, but this can be used in a way to preserve already damaged creatures, such as other heroes. If using a quirk or animal genetic, it will draw energy/stamina from the respective being inside Inanis' black hole, which just leads to a vast empty space, soaked in complete darkness. The space itself has breathable oxygen, but no gravity or time. If Inanis is damaged, he can also spit up the objects and beings absorbed again, with less velocity and speed, which also damages him. To him, being forced to remove something from his black hole feels like one would feel like when vomiting up blood with a sore throat and a burning sensation in their stomach.
Of course, this vacuum created is strong, as is the repulsion stream, so it can take objects bigger than the black hole to Inanis. If he doesn't watch out, these objects will hit him with a strong force, especially if is bigger objects like an empty locker. His black hole can only get as big as there is room inbetween the metal plates of his two halves, up to a size where it can swallow atleast an average adult male person, after this it'll only have a couple dozen more centimetres to work with before becoming too big and collapsing into Iranis.
TL;DR: Basically Kirby but with extra steps and way fancier than just outright suck and copy.
Other: Ochaco pretty much just put him into the school, which he just accepted and went along with like he always does with things.