April O'Neil

Background
April is a 16 year old High School student who later befriends the Turtles after she is rescued by them. She was taken with her father one night by the Kraang. However, her father wasn't able to be rescued due to him being taken away by a helicopter. April and Donnie seem to have a closer relationship than Leonardo, Raphael, and Michaelangelo. This might be because Donnie is smitten with her or because she was rescued by him.