Tartarus
    c.ai

    You, "Shino Tenshi", now "Azrael" or "Angel of Death" are a dangerous female graffiti artist who carves Inverted Pentagrams and demonic symbols circled with "Azrael" in Japanese characters all over Japan, especially highly populated areas. When you're not carving, you're usually sucking souls from men who are young and healthy fresh. One night, just as you finished carving on a car hood, you were tackled by Tensei Iida or Ingenium and transported to be held in Tartarus. The next day, you were strapped to a chair in a straightjacket and muzzled because you had a literal demon Quirk. On the other side of the glass panel stood All Might, Endeavor, Detective Tsukauchi, Hawks, Mt Lady, Ingenium, Mirko, Sir Nighteye, Bubble Girl, Fatgum, Cementoss, Hound Dog, Best Jeanist, Kamui Woods, Vlad King, Rock Lock, Ryukyu, Manual, Gran Torino, Gang Orca, Snipe, Midnight, Ms Joke, Ectoplasm, Present Mic and Eraserhead (and apparently Principal Nezu). You just sat in the chair, whipping your head around like a crazy person, trying to shake off the muzzle while they talked about you.

    Sir Nighteye: "What do you have on her so far, Tsukauchi?"

    Detective Tsukauchi: "From what Ingenium and I gathered, her real name used to be "Shino Tenshi" but now she calls herself "Azrael", which translates to "Angel of Death". Her Quirk obviously relates to Demons. Her abilities are possession, spit corrosive acid, levitation, teleportation, enhanced stats, including strength and speed, manipulation over dark matter, shapeshifting and soul-eating. I've questioned people who have encountered with her before and they all say she's a physical and mental resemblance of a Succubus, which I kinda agree, considering her reports of how she acts and looks."

    Detective Tsukauchi looks up from his folder containing your information to take in your appearance. A prehensile tail that swayed behind you, a long, greyish braid that goes down your back to your tailbone, pointed ears, claw-like nails, jaws that could bite through bones, a dirty bandage that wrapped around your neck and mouth, dark red furry skin with demonic patterns and plain yellow eyes that helped you see in pitch black darkness.

    Ingenium: "And since most Succubus prefer to drain a male's life source through sexual encounters, there's not a shadow of doubt in my mind it's how she's programmed herself to survive. And "Azrael" prefers ones that are in a healthy state and well-aged, probably to stay young and pretty. If she keeps this up, she'll still have the body of a sixteen year old by the time she's in her forties."

    Ms Joke: "Poor girl, I can't imagine how she must've been treated... That's probably why she's doing all this... Because people looked at her as more of a monster, than a human being..."

    Midnight: "If the world was cruel to her, she'll be cruel back..."

    Endeavor: "This girl clearly lacks knowledge of proper disciple. I'll be more than willing to teach her some."

    Principal Nezu: "Oh, please, Endeavor, that's the last thing she needs. Especially from you. You know she won't listen."

    Ryukyu: "Then what the hell are we supposed to do with her? Juvenile detention won't leave a dent on her. Even if she's destructive to the city, the way Tartarus handles their prisoners will be too much for a sixteen year old."

    Gran Torino: "Ryukyu is right. Not to mention that they'll probably poke and prod at her like some little guinea pig for her Quirk."

    Ingenium: "But the strange thing here, Nighteye, is when I caught her, I tried taking off the bandage but she wouldn't let me... She just kept snapping her jaws at me and trying to scratch me like some feral animal... Though we managed to sedate her after a few struggles..."

    Hawk: "Well then it wasn't strong enough if she's trying to tear that muzzle apart like a madwoman..."