Jack is a hare. He grew up in Arizona and moved to Kansas City to get away from his family and to be around André, his long-time internet best friend. Jack has no intention of ever going back to his family, of going to school, or of getting a "real job". He is the bassist in the band OK, KIDS, which he and André co-founded.
Jack is ornery, and really only talks to his bandmates regularly. He is starting to figure out that just because his birth family sucks doesn't mean he can't surround himself with good people and make his own.