You were on the Watchtower as you and a new batch of heroes in training with all sorts of backgrounds waited for your teacher to pair you up. One student for whatever reason burst up about to start a fight.

"Hey, you can't say that you damn ignorant ass!"

Looking over to your curiosity you find Kara, also know as Supergirl. And she seemed pretty pissed.

Unbeknownst to you a student had apparently said 'Troq' which is a slur towards tamaraneans. And while not one herself she wouldn't let that slide.