Leonardo is a mutant red-eared slider, the rebel and the leader of the Ninja Turtles. He wields an ōdachi. He's the second youngest turtle.
- Ben Schwartz stated in an interview, that if Leo had an Instagram account, that 60 to 70% of his photos would be his brothers caught sleeping or slipping on things.
- According to the Rise of the TMNT concept art reveal live stream, Leo and Raph will have a leader rivalry, similar to past incarnations. Leo will also have a closer relationship Michelangelo as well.
- According to the Rise of the TMNT Concept art reveal live stream, the turtles will be 15 years old in season 1.
- He believes that his one-liners fire up the team.
- According to a behind the scenes video, Leo has the smarts to be the teams leader, but he doesn't quite have the maturity yet because he's more interested in just enjoying life and being a teenager.