Katana Swords


Ninja Turtles (Leader)


Karai (adoptive older sister),

Raphael, Donatello, Michelangelo (younger brothers),

Master Splinter (sensei/adoptive father),

Tang Shen (deceased adoptive mother),

Ice Cream Kitty (pet)


April O' Neil,

Kirby O' Neil,

Casey Jones,



Teen Titans




The Kraang, and Villains

Skin Color


Eye Color




"My name's Leo and I've got 3 rowdy brothers who always give me a hard time, but I keep them in line... usually.

Master Splinter picked me to lead because I eat, sleep and breath Ninjustu. Not that my brothers aren't good, I'm just better."—Leonardo

Leonardo or Leo is the leader of the TMNT, and one of the four main protagonists of the Teenage Mutant Ninja Turtles series. He is the younger half-brother of Karai, older brother of Raphael, Donatello, and Michelangelo, and the second eldest child to Master Splinter. He is "The Leader" of the team.

He appears in Marvel's Spider-Man: Legacy.


Leonardo and his brothers were once ordinary turtles: when they were infants, they were adopted from a pet store by Hamoto Yoshi (Splinter). When their soon to be father walked passed a strange man, a kraangdroid, he felt something odd about him and followed. Unfortunately Splinter gave away his position when he accidentally stepped on a rat's tail. The Kraang found him and attempted to kill him, but Splinter fought back hard. In the end, the Kraang dropped the canister of mutagen causing the turtles and Splinter to mutate. Splinter came in contact with a rat last, thus mutated into a rat, While he and his brothers, after coming in 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 down there, and made the four turtles his children. Knowing the world would be dangerous and there would be a time where they want to explore the outside world, Splinter trained the boys in the art of Ninjitsu. He and his brothers were named after great Renaissance artists from a book Splinter fished out of the storm drain.


Like the intro states he is the leader and makes the commands. Leo is the most serious and disciplined out of all the turtles and is of course their leader. He has a lot of responsibility on his hands, which can sometimes overwhelm him. He watches a T.V. Show called "Space Heroes" and wants to be just like the captain he sees on T.V. Overall, Leo acts as a big brother to the turtles and as a teacher's pet to Master Splinter. He was chosen to be the leader because of his willingness not by his skill. Leo is the most mature out of all his brothers, aside from Donnie, always acting like a guide and sometimes even a parent to his brothers. He is very protective of his siblings and is willing to do anything for them. Unlike all his incarnations, Leo is somewhat a sci-fi geek, aside from Donnie. Though he's more of a techy geek. Leo loves "Space Heroes" and tends to try to be like the hero on there, much to the annoyance 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 expirenced and balanced of the team and demonstrates many important qualities needed in a leader. Leo does his best to lead the team, but he sometimes second-guesses himself and his constant sibling rivalry with Raphael can cause problems for the team and puts a strain on his relationship with Raph. He often tries to compare himself to the main character of "Space Heroes", Captain Ryan, which annoys his brothers.


Leo is an extremely skilled martial artist and swordsman. His weapons of choice are a pair of katana blades which he uses in a traditional niten-ryu style. He has a good line of defense, and is the best at planning strategies. He is pretty strong when it comes to defense and counter attacks and he is mainly a well ballanced ninja in terms of strengh, speed, agillity, and intelligents.  Like his brothers, Leo is stealthy, can hide in the shadows, sneak around without being detected, and use hand to hand combat like a real ninja.


  • Leo is voiced by actor Jason Biggs, best known for his role as Jim in American Pie.
  • Leo admires Captain Ryan from his favorite show, Space Heroes.
  • Leo was named leader because he asked, not by Splinter's choice.
  • At times, he can be a bit overconfident.
  • Leo's T-Phone ID lists him as "Leo Ichiban Turtle". "Ichiban" is Japanese for "The First" or "The Best".
  • This version shows Leo's more teenage side because in previous incarnations in the Teenage Mutant Ninja Turtles franchise, Leo's personality was a more of a grown-up part.
  • He can hold his breath underwater for about 15 minutes.
  • His swordsmanship is unmatched.
  • The blue in his bandana represents his main emotions: calmness and leadership.
  • He has slight Atychiphobia (fear of failure).