Batwoman and Batgirl Are 2 Different Characters
Just a PSA: Batwoman Is Not the Adult Version of Batgirl
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So...Batwoman goes on to become the brainpower in the Bat operations in most canons, changing her alias to Oracle.
— Brochef Tallman (@Buck_Tallman) September 29, 2019
What triggers the change? She becomes paralyzed.