Cousin of Bruce Wayne (aka Batman). In his absence, she assumes the mantle of Batwoman and protects Gotham. She also flirts with Kara and kicks/punches Barry and Oliver.
At the beginning of season two, Kate’s plane crashes and she’s presumed dead. However it turns out she’s actually alive but unrecognizable due to injuries she sustained in the crash. She is bandaged and being held hostage. [At this point, Kate was recast as Wallis Day]