The Foot Ninja, serving the powerful Foot clan, are a dangerous group of ninjutsu-trained thugs. Led by Shredder or Karai, they constantly pose a significant threat to the Turtles. Inspired by Daredevil comics' criminal ninja clan Hand, the Foot Clan practices the art of ninjutsu. With their expertise in stealth and combat, they are the primary adversaries of the Turtles, making every encounter a fierce battle for both sides.