Cosma is a female villain from OK K.O.! Let's Be Heroes. She is one of investors of Boxmore, a pure evil robot factory owned by Lord Boxman.
She is voiced by Marina Sirtis, who also portrayed Demona and Queen Bee in Young Justice, Mary Ann Eagin and Detective Inspector Walker in Gadgetman. In "Deep Space Vacation", she was voiced by Betsy Zajko.