Jess is an enigmatic and angry girl.

She enjoys beating people up and working out, partly because she likes exercising but mostly because it keeps her in shape to beat people up more. Though she seems to be angry just for the sake of being angry, Jess has her reasons for her bad attitude (not good reasons, but reasons nonetheless). Similarly, there's no immediately discernable reason for her odd hairstyle or why she remains loyal to the other outcasts at Frackstonville High (when she's not pummelling them), but there is a reason to everything she does. Not that she's a deep person by any stretch of the imagination. She just doesn't open up much. Or at all.

The one thing that infuriates Jess more than anything else is the common misconception that she is either 1) a guy or 2) a lesbian. Stating either in her presence will result in the worst pain you have ever experienced in your life. Of course, she makes no attempt whatsoever to appear feminine, so she really brings it upon hersel--Oh, hey, Jess! I d-didn't see you there! Heh... What's up--OW! STOP! OH, #%@$, IT HURTS!!!