Donnie is a spiny soft shell turtle mutant. He has three brothers, Raph, Leo and Mikey, and an adoptive older sister April O’Neil. His father is Splinter Hamato. He has a sentient robot son called, Shelldon. Donnie may come off as aloof and uncaring to others and his loved ones, but deep down he truly cares about his family and friends. He just struggles to express his emotions most of the time due to his low empathy and Autism, however despite that he still cares for people.