Leo is intelligent and quick-witted. He uses his sharp skills to beat opponents, find shortcuts around obstacles, and always knows the perfect time to land one of his many one-liners. Leo is cheerful, prone to making jokes—sometimes at inappropriate times—and uttering quips he believes "fire up the team" as expressed in “Donnie's Gifts”. His persistently carefree nature causes him to possess an airy quality and he enjoys spontaneity. It's also said in the first episode of the series that humor is how he manages to cope. Leo has confidence that usually turns into arrogance and his brothers are often annoyed by his lack of humility, making him difficult to play games with, such as in "Lair Games". Leo is known to be a compulsive liar as seen in "Flushed, but Never Forgotten". He doesn't like being in trouble so he makes his brothers promise not to tell Splinter about Piebald’s fate, even willing to hurt Michelangelo if he tries to ……