The Joker (Unknown)

Name: Unknown.
Alias: The Joker.
Nationality: American (Assumed).
Alignment: Bad.
Affiliation: None.
D.O.B: Unknown.
Status: Alive.
Bio:
There is very little information about who the Joker truly is. He has no fingerprints and his DNA has been altered that it is impossible to trace it back. The earliest piece of evidence of who the Joker is comes from CCTV where he was recorded exiting a vat of chemical acid at Ace Chemicals, having fallen in after being chased by the Batman posing as the Red Hood. Since that night, his mind was altered. He now sees life as one big joke, and creates chaos just for the fun of it. There is no goal in sight, but to bring terror... and a little smile to everyone's face.

Throughout his career, the Joker has brought a lot of distress to the Batman. He paralyzed Gwen Gordon, whom was once the Batgirl, and also killed one of the Batman's sidekicks. All of this was just to terrorize the Batman, and the Joker found it hilarious.

Credit where it's due.