They have a 10 year old adopted little sister, Elisabetta, who they're very overprotective of, and don't bring her on missions or night patrols with them.They suffer from PTSD after the fight with the Kraang, but the Kraang are gone.Sometimes April and Casey visit to hang out with the turtles and Elisabetta, or to babysit her.They know that Elisabetta's a turtle mutant like them, but she hides it with a cloaking device in her necklace.Raph and Donnie often go overboard worrying about her safety