DC

Arkham Jumpsuit is a relatively minor character in the DC Comics universe, primarily associated with the various Arkham facilities. The name "Arkham Jumpsuit" isn't actually a character name, but rather a descriptor for the orange jumpsuit worn by inmates within Arkham Asylum and Arkham City. These jumpsuits are a symbol of incarceration and the often unstable mental states of those confined within.

Therefore, "Arkham Jumpsuit" doesn't refer to a single, distinct individual with a backstory and powers. Instead, it represents the collective population of Arkham's criminally insane. The jumpsuits serve to visually differentiate the inmates from staff and to strip them of their individuality, reinforcing the asylum's control.

While no specific character is named Arkham Jumpsuit, the many villains who have worn the garment are iconic figures within the Batman mythos, including the Joker, Harley Quinn, Poison Ivy, and countless others. The jumpsuit is a visual shorthand for madness and the dark underbelly of Gotham City's criminal element.