Conversation so far:
What is the animated series about for Leonardo of Teenage Mutant Ninja Turtles?
In the 1987 TV series' theme song lyrics, Leonardo of Teenage Mutant Ninja Turtles is said outright to be the leader of the TMNT, and there is little disputing this.

Question: Did Leonardo become more brave in the series?
Self-contained rewrite: Did Leonardo of Teenage Mutant Ninja Turtles become more brave in the TV animated series?