Supergirl character's and the true about them: Kara Danvers: Betrayed her aunt. Lena Luthor: Lived off the Luthor's alien-racist legacy. J'onn J'onzz: Abandoned his people. Alex Danvers: A drunken party goer. Cat Grant: Got rid of her son. James Olsen: Sponged of Superman's fame. Maggie Sawyer: Cheated on every girl she was with. Mon-el: Lived off his slave-owning parents legacy.