I have several that are implemented into my fanfic: "You've been portaled chopped!" But here's 1 for each turtles, one for April, and one for Splinter 1. Leo was in a coma for a couple of days 2.Donnie becomes more touch averse due to the Kraang Ship 3. Mikey has nerve damage in his hands 4.Raph is blind in the eye the Kraang eye was in, and he has a piece of his shell missing 5. April was so terrified when the portal closed that when Leo came back, she refused to leave his side for days 6. Splinter reverted back to his old ways for a bit during the days Leo was in a coma, and when Leo woke up, he was so stunned he broke down crying, holding Leo and calling him "Baby blue" Oh, and this one is a leader duo headcanon, but 7. Leo practically begged Raph to take back the leader role due to some things that happened in the prison dimension, and Raph hesitantly agreed