Bio: Batgirl aided Batman in his search for their missing
partner, Robin. After 3 weeks, they discovered that The Joker and Harley
Quinn had kidnapped him and were holding him at the old Arkham Asylum,
now demolished, with the inmates moved to a higher security building.
She watched in horror as The Joker revealed to Batman his greatest
achievement in “Joker Jr.” or "Jay Jay", a Robin poisoned into looking
like an exact duplicate of Joker himself, his adoptive “son”. After
failing to reach Harley, they fought outside the Asylum; Harley fell
down a seemingly bottomless pit, to her supposed death. Upon returning
insider the Asylum, Batgirl saw Joker dead, a “Bang!” sign impaled in
his chest. She attempted to comfort the distraught Robin as Batman
watched on, unable to react to the Joker’s final crime.
For more, refer to the Comm.