Twenty-four-year-old Kara Zor-El, who was taken in by the Danvers family when she was 13 after being sent away from Krypton, must learn to embrace her powers after previously hiding them. The Danvers teach her to be careful with her powers, until she has to reveal them during an unexpected disaster, setting her on her journey of heroism. Kara Zor-El who is the cousin of Kal-El better known as Superman.
Supergirl is to become the first live-action TV series to feature a transgender superhero.
Activist and actor Nicole Maines, who is transgender herself, will play the role of Nia Nal, who becomes known as Dreamer. "It seems only fitting that we have a trans superhero for trans kids to look up to," she said after the announcement at Comic Con in San Diego, California. Nia Nal will be introduced in Supergirl's upcoming fourth season.