In the CGI Universe
Leonardo is the oldest sibling of the Ninja Turtles, the assumed leader of the latter group, and one of the primary protagonists of the Teenage Mutant Ninja Turtles franchise. Named after the greatest artist of the Renaissance period, Leonardo Da Vinci, Leonardo is the one who assigns his fellow siblings the tasks, they need to accomplish, and focus always on their mission. In battle, he wields two katanas, ready to challenge any foe or enemy he would find. The 2003's adaptation of the character is featured in the second Heroes vs. Villains as one of the main fighters on the side of good.
Another form in CGI Universe