Leonardo is the official leader of the four turtles.
He takes this role seriously — sometimes too seriously.

Raphael is easily the most emotional of the four, even though he hides it with his "tough guy" facade. 

Donatello is the smartest of the four brothers. His intelligence is essential for the team’s survival. 

Michelangelo is the most fun-loving, positive, and easygoing member of the group. He’s naturally playful, creative, and always finds something good in every situation.

