They should just rename the show...

It gets better!

https://www.datalounge.com/thread/17728211-supergirl-season-2

Three new cast members are joining the DC superhero drama when it returns for its fourth season Sunday, Oct. 14 at 8 p.m. on the CW, including transgender activist Nicole Maines, who will be portraying Nia Nal aka Dreamer, television’s first transgender superhero. Joining Maines are new series regular April Parker Jones, who will play Colonel Haley, and David Ajala, who will recur as Manchester Black.
Nia is being described as a “soulful” transgender woman with a “fierce drive to protect others.” The season she will follow in Kara’s (Melissa Benoist) season 1 footsteps in coming into her own and fulfilling her destiny as a superhero. Colonel Haley is a “hardline career military woman [who] lives and dies by the orders of her commanding officers” and will act in the country’s best interest, even when it doesn’t match her own. Based on the DC character, Manchester Black has a dark past but “easily deflects the brutality of his mission with charm and a sense of humor.”
https://variety.com/2018/tv/news/wbtv-comic-con-news-roundup-1202880130/