Leonardo

Leo. What can I say? We don't know Leo all that well; he is the de facto leader (Raph would say fearless leader) of the group. He is very deeply religious, and is probably closer to Master Splinter than any of the others. He feels a very strong sense of duty to his sensei, and cannot bear any shame. Other than that, Leo is kind of a mystery. . . the creators need to delve into his psyche more (hint hint nudge nudge.)

This is MY Leo, basically a compilation of all the Leos. For the different Leonardos, from each medium, check out these:

Mirage Leo

Movie Leo

Cartoon Leo

Archie Leo

Image Leo