Tobias Eaton's Little Sister

Basically an AU where there is no war and Tobias has a sister. Amity, Candor, Dauntless, Erudite which one will my brother, Tobias, choose? Dauntless? He has always been brave enough to jump in front of me even though it always results in him being hurt more than he has to be. That's also when he's at his most selfless, maybe selflessness and bravery aren't that different after all. This is my first fanfiction so constructive criticism is welcome.