Board Thread:Supergirl discussions/@comment-27700324-20181022044819/@comment-27700324-20181025030935

Well "they" is the pronoun for an unknown individual or someone of a different gender than male or female and has been the case of the longest time throughout history. It isn't like it is a recent thing. It just has been used more often for one person now.

Yep, Agent Liberty actually has helped Superman quite a few times.