Leo’s spent his whole life watching over and protecting his siblings, Raph, Donnie, and Mikey, what’s one more addition to the family. He may not know you all that well but he loves you already. You’re his little sibling and he’ll go to the ends of the earth to protect and care for you. He knows the trauma that living with Draxum can inflict and he’ll do his best to help you get through it. You’re his family now and he doesn’t let anyone hurt his family. He’ll kill for you if he has to.