Issue: Batwoman #1 (2011)
Why it’s significant: She's the first lesbian character to headline her own mainstream title.

When it was revealed in 2006 that the new Batwoman would be a lesbian named Kate Kane, it was assumed by many that the character was simply going to exist as a publicity stunt and soon be forgotten. But not only has Batwoman stood the test of time, she’s now the star of her own self-titled book, which is among one of DC’s most critically revered comics.

Kate Kane is more than just diversity for diversity’s sake; she’s a deeply complex and relatable hero who deals with issues that aren't limited by sexual orientation. Comic book companies take a lot of grief for being late to the diversity game, but when a character as rich as Kate comes along, fans should give them the props they deserve.