Batman #481 DC Comics (1940)

Maxie Zeus is still running things from inside Arkham Asylum, and his mad assistant is up to something, leaving the Dark Knight to stop her.

Maxie Zeus sent a message to his gang via his girlfriend, Iris. She overheard them discussing their leader in a bad light, but she told them to call off their heist anyway. Iris had a breakdown and became Harpy. She was there to take down the gang when they went on with plans. They escaped when Batman showed up and Harpy went for him instead.