Kate Kane

Katherine "Kate" Kane, is a wealthy individual, and former military school cadet. She is the daughter of Jacob Kane and the late Gabi Kane, the twin sister of the late Beth Kane, the step-daughter of Catherine Hamilton-Kane, the step-sister of Mary Hamilton, and the maternal cousin of Bruce Wayne.

Early life
Kate Kane was born to Jacob and Gabi Kane, along with her twin sister, Beth, in Gotham City. From an early age, Kate and her twin sister were very close with their cousin Bruce, who they considered an older brother.

On their 12th birthday, their mother took her and her sister out for their birthday. On the way back, they were hit by a black car, and taken by terrorists.

The three are taken to an unknown building, where they shot and killed Gabi and Beth before Jacob showed up, rescuing a traumatized Kate.