Lena Luthor

Lena Kieran Luthor is one of the two tritagonists of the television series Supergirl (alongside J'onn J'onzz). She is the half-sister of Lex Luthor, the best friend of Kara Danvers and the godmother of Alex and Kelly's foster daughter Esme. She tries to rid her company LexCorps of her brother's crimes. Lena is initially angry at Kara for never telling her that she is Supergirl and for a majority of Season 4 and 5, gets back at her. However, Lena eventually realizes the error of her ways, reconciles with Kara and becomes her best friend once more and full-time member of Supergirl's team.