BANGOR (AP) – An activist in Maine who won a lawsuit over using the girls’ bathroom at her school is making her TV debut as a transgender superhero.

This image released by The CW shows Nicole Maines, left, and Melissa Benoist in a scene from “Supergirl.” Maines, a Maine transgender activist who won a discrimination lawsuit over using the girls’ bathroom at her school, is making her debut as the character Nia Nal on the superhero series which premieres its fourth season on Sunday. (Bettina Strauss/The CW via AP)

The Bangor Daily News reports 21-year-old Nicole Maines will appear on Season 4 of The CW’s series “Supergirl” on Sunday.

The Orono native will play Nia Nal, also known as Dreamer. Producers say the character is a “soulful young transgender woman with a fierce drive to protect others.”

The character is believed to be the first transgender superhero on U.S. television.

Maines gained attention for her lawsuit against her school district after her elementary school said she could no longer use the girls’ bathroom. Maine’s highest court ruled in 2014 that officials violated state anti-discrimination law.

Maines has made previous TV appearances, including the show “Royal Pains” and the HBO documentary “The Trans List.”

In this June 26, 2016 file photo Nicole Maines poses at her home in Portland. Maines, a transgender activist who won a discrimination lawsuit over using the girls’ bathroom at her school, is making her debut as TV’s first transgender superhero. (AP Photo/Robert F. Bukaty, File)