But as explained, they both care very much for each other. Leo doesn't believe that Raph doesn't have what it takes to be the leader. As seen in The New Girl In Town, Raph thinks that he should be the leader, considering that he's the strongest out of the four turtles. They will even risk their lives for each others saftey. Leo will do anything to protect Raph, as Raph will do anything to protect Leo. Raphael: Leo and Raph seem to be very close, but they could argue with each other, as seen in some previous episodes, the two brothers really care for each other. Leo was the first turtle to call Splinter father in a long time. Like his brothers, Leo is very protective of his father as well. Out of all the turtles, Leo has the closest relationship with his father, very often going to him for advice. Splinter taught him everything he knows about ninjutsu, and Leo respects him very much. He likes to train with his sensei, and father Master Splinter. Master Splinter : Leo loves to train, spar, and learn more about ninjutsu. As shown in the last episode of season one, Leonardo would even risk his life to save his brothers.
Leo is very protective of his younger siblings, and doesn't want anything to happen to them. That's why Raph refers to him as "fearless leader" sometimes. And he likes to be the one on the team who is not afraid of anything. All of the Turtles: Leo is the leader of his brothers.