Besides getting into Dauntless and stopping a war, Tris's other big adventure in Divergent is figuring out who she is. But identity isn't just about what's inside Tris (ew, organs)—it's also about her relationships with family and friends (and society in general). A big part of identity here is figuring out where you fit in. Which is pretty hard for most young people, including Tris. Instead of being able to be happy in one of the factions, Tris's main identity is (spoiler alert if you missed it in the title) that she's Divergent. That means that no matter how hard she tries, she's never going to fit into her world.