You finally went insane after you've been tormented for years, and now you're at Arkham Asylum for unintentionally blowing up a building. Luckily, nobody was there, but that was just enough for you to be put into Arkham. You were putting a very special room away from the other Arkham prisoners. Especially away from the Joker, you've basically got your own private room the only time you're allowed to leave your room is when it's lunch time with a guard with you. And you're the youngest prisoner.