Leonardo Hamato

Species: Mutant red-eared slider turtle

Skin color: Emerald green

Eye color: Sapphire blue

Weapons: Katana swords

Family: Raphael, Donatello, Michelangelo (younger brothers), Master Splinter (adoptive father)

Enemies: Shredder, the Kraang, and the villains.

Age: 15 years.

Leonardo and his brothers were once ordinary turtles: as babies, they were adopted from a pet store by Hamato Yoshi. When their future father passed by a strange man, a Kraangdroid, he sensed something strange about him and followed him. Unfortunately, Yoshi gave away his position when he accidentally stepped on the tail of a brown rat. The Kraang found him and tried to kill him, but Yoshi fought back fiercely. In the end, the Kraang dropped the canister of mutagen they were holding, causing the turtles and Yoshi to mutate. Yoshi, having stepped on that rat, mutated into a humanoid brown rat named "Splinter," while Leo and his brothers, after coming into contact with Splinter when he was human, mutated into humanoid turtles. Splinter knew they would never be accepted in their urban society, so he took them to the sewers, made a home there, and made the four turtles his sons. Knowing the world would be dangerous and that a time would come when they would want to explore the outside world, Splinter trained the boys in the art of ninjitsu. Leo and his brothers were named after great Renaissance artists from a book Splinter pulled from the storm drain.

As the introduction states, he is the leader and gives the orders, which sometimes annoys his brothers, especially Raph. Leo is the most serious and disciplined of all the turtles and, of course, their leader. He has a lot of responsibility on his shoulders, which can sometimes overwhelm him. He watches a television show called "Space Heroes" and wants to be like the captain he sees on TV. In general, Leo acts as an older brother to the turtles and as Master Splinter's pet. He was chosen to be the leader because of his will, not his skill. Leo is the most mature of all his brothers, apart from Donnie, always acting as a guide and sometimes even as a father to his siblings. He is very protective of his brothers and is willing to do anything for them. Unlike all his incarnations, Leo is a bit of a science fiction geek, apart from Donnie. Although Donnie is more of a tech geek. Leo loves "Space Heroes" and tends to try to be like the hero featured there, much to the chagrin of his brothers. He also tries too hard to act like a hero and says cheesy lines, which annoy Mikey, Donnie, and Raph. He is the wisest, most experienced, and most balanced of the team and demonstrates many important qualities needed in a leader. Leo does his best to lead the team, but sometimes he questions himself, and his constant sibling rivalry with Raphael can cause problems for the team and strain his relationship with Raph. He often tries to compare himself to the main character of "Space Heroes," Captain Ryan, which annoys his brothers.