Kyle wasn't at the academy often, he was usually doing work for the Rebel alliance, out on missions with Jan. It would make sense that he didn't have robes, they wouldn't serve the purposes he would need them for, I guess.
She was speaking a form of mandolorian, though it was just recycled lines from the Twi'lek language. There was almost no point to add her in the game in the first place. Moocha shaka baka... Yeah right..
It's not so much the computer not being able to handle the model in the game, it's more of the engine having it's limits. The engine only allows so many dual wielding tavions with Kylo Ren sabers, even if they were super low poly.... ..And don't even think about letting them attack them you, if they all ignited their sabers the game would lag to no end...