Answer
In the television series Supergirl, Chyler Leigh portrays the character Alex Danvers, who shares a close friendship and professional alliance with J'onn J'onzz. Alex serves as the head of the Department of Extranormal Operations (DEO), a covert organization dedicated to protecting Earth from extraterrestrial threats. Meanwhile, J'onn J'onzz is a Martian shapeshifter and one of the founding members of the DEO.