Batman: Arkham Asylum Gretchen Whistler 1 game Gretchen Whistler is a character from Batman: Arkham Asylum. Verified 22 Aug 2026 Appearances Games featuring Gretchen Whistler 89 Batman: Arkham Asylum 25 August 2009 Other characters in Batman: Arkham Asylum Full cast Batman Amadeus Arkham Oracle Aaron Cash Bane Harley Quinn Ian Kennedy Henchman #2 Frank Boles Killer Croc Bob Johnson Jim Gordon
