Tatsunori Kinniku was a renowned warrior from the Kinniku Clan and father of Mayumi Kinniku, as well as brother to Sadaharu Kinniku. He is featured prominently in Kinnikuman (2011) and has a mark known as the KIN on his forehead. During one war, Tatsunori was almost captured but managed to defend himself using a technique called Niku Curtain. Despite being punched and kicked for days, he never lowered his guard or arms. In the anime, Tatsunori used the Kinniku Guard for three months to safeguard his mask during an invasion on Planet Kinniku by Space Samurai. Mayumi shared a story about her father's bravery during the 21st Choujin Olympics The Big Fight, where he was captured but managed to preserve his mask through self-defense.