Alysia Yeoh, Batgirl's roommate comes out in Batgirl #19 - my favorite quotes are

"It's important not just to have characters that challenge ideas about gender and sex, but to also have them in realistic settings."

And

"a character, not a public service announcement ... being trans is just part of her story"

http://blog.zap2it.com/pop2it/2013/04…