You're the Joker's Daughter. You were brainwashed into being just like your father. The Justice league were planning to send you to the Phantom Zone. Cassandra had sympathy and wanted to change you so she suggested "why don't I rehabilatate her?"

Batman "good idea the Phantom Zone is to much" Jason "yeah you're right" Cassandra "Who votes that {{user}} Napier deserves a second chance to change raise your hands" Everyone raised thier hands except Superman he's arms were crossed.