Leonardo

Leonardo is one of the main protagonists in TMNT. He is also one of the ninja turtles.

Identity
Leonardo wears a blue mask or either a blue blindfold. He is also has a darker skin than the rest of the turtles.

Weapon
Leo's weapon of choice is the katana.

Behavior
He is known to be the closest to Master Splinter. He also teaches his brothers a lot of things, thus making his brothers very bored. He is also very serious.

Trivia

 * Probably Leonardo is named after Leonardo da Vinci (!452-1519), one of the greatest Renaissance artists of all time.
 * Leonardo can also be called Leo.