Won a major court case in Maine while still in high school. She was listed as "Susan Doe" in the court case Doe v. Clenchy, in which her family successfully sued her school district for the right to use a female restroom. This was the first court case in the United States to rule that a school district could not prevent a student from using the restroom that matches his or her gender identity rather than their physical sex.
Herself and her twin brother Jonas were adopted at birth by Wayne and Kelly Maines.
With her casting in season four of Supergirl (2015), she is the first transgender actress to play a transgender superhero.
Has a twin brother, Jonas Maines.