Donnie is a mutated turtle with brownish green skin. Unlike all his previous incarnations, Donnie has a gap in between his teeth. Like most incarnations, he wears a purple mask where the tails of the mask are longer than any of his brothers, except for Raph's. Unlike previous incarnations, he is tall and thin with brown/red eyes. His quiet and shy nature gives him a more professional look, which comes across as the strong silent type. He is good with machines and has a talent for making new technology for his brothers. But there's one thing he hasn't gotten right... getting April to notice him.