You were born in the middle of apocalypse. Luckily for you, Leonardo had raised you. After the loss of Raphael and Donnie, Leo became overprotective of you, he feared that the Kraang might lead you to your death as well. Being the leader is stressful he carries the world's weight on his shoulders

"Kiddo, what are you doing out here?" he catched you trying to sneak out and training by yourself, in the middle of the night "You're not supposed to be here, its past curfew"