He is the oldest, wisest and most cautious Turtle, the one who always plays by the book. He also bears the great burden of being the team's chosen leader. Leo is dedicated to perfecting his ninjutsu skills and will stop at nothing to defend his brothers and the entire city. Wearing a blue bandana, with katanas holstered on his shell, Leo firmly believes it's his ninja duty to protect all people.
Named after Leonardo Da Vinci
His weapons' were bestowed upon him by Splinter due to the turtle's sharp mind and steely resolve
Oldest of the 4 Ninja Turtles - considered the "big brother"
Bears the burden of the responsibility of his brothers and sensei
The hardest worker, studier and trainer
Leonardo has a faded scar running from the right side of his forehead to his right cheek. He wears wooden armor on his chest resembling a Yoroi samurai armor's chest plates. He also has shoulder pads and a samurai skirt, besides custom made japanese footwear. There are japanese characters painted blue on the back of Leo's shell.
Splinter and the Turtles were laboratory experiments, much like in the IDW comicsorigin story.
Leonardo's face is based on both Russell Crown and Nelson Mandela.
Johnny Knoxville voiced Leonardo for the first film, but didn't voiced him in the sequel.