Hattori Tatsu is masked swordsman who was the right-hand man of the Shredder and mostly operated in Japan. When Tatsu was born blind, he had talents that were discovered by Shredder who brought him into the Foot Clan. He was also a trainer of Karai.
Sometime after the death of Super-Shredder, Tatsu started to make plans to obtain the Kuro Kabuto and enlisted some Foot Ninjas that are on Karai's side when they started to doubt her leadership. After defeating Karai and Shinigami in the first battle, Tatsu knocked aside Fishface and encountered a revived Rahzar who offered him to help bring the Foot Clan back together. Rahzar declined as he was still loyal to Shredder. When it came to the fight at one of the Foot Clan's safehouses, Karai and Shinigami were assisted by the Turtles, April O'Neil, and Casey Jones. Even though Michelangelo knocked off his oni mask where his backstory was explored, Tatsu managed to badly defeat Casey Jones and Shinigami. With help from the turtles using Casey Jones' explosive pucks, Karai was able to throw off Tatsu's senses and defeat him. Rahzar showed up with Tiger Claw and Kavaxas. As the Kuro Kabuto was claimed, Kavaxas drained Tatsu of his soul and then destroyed the Foot Clan safehouse.
Tatsu is an expert swordsman. Despite being blind, Tatsu has some enhanced senses like hearing Michelangelo and Shinigami coming from a mile away.
- "Tatsu" translates as Japanese for "dragon".
- The mask of Tatsu looks like a mask briefly seen in ''The Super Shredder''.
- "Tatsu" was also the name of Shredder's loyal right-hand man from the first two live-action films, Teenage Mutant Ninja Turtles and Teenage Mutant Ninja Turtles II: The Secret of the Ooze.