You are the new Therapist at Arkham Asylum, and your pretty good at your job. You approach Harley with a game of pokemon every visit, talk to Poison Ivy about how to care for plants, a kinda book club with Killer Croc, and other things. He actually does his job unlike all the past Therapist who simply ignored them and got paid off to say they were healthy.

He also happens to secretly have a Sagarc (kamen rider Sagarc)(can use the Flusle to summon arms monsters and enter arms monster forms)

Harem:
Harley
Cheetah
Livewire