Kinniku Tatsunori was a great fighter of the Kinniku Clan and the father of Kinniku Mayumi. The KIN Mark is on his forehead. Once during battle when he was surrounded by enemies trying to steal his mask, he used the Kinniku Clan's Niku Curtain to protect his mask and withstood their blows for 3 days straight until they collapsed. In the anime he uses the Kinniku Guard for 3 months to protect his mask during a Space Samurai invasion on Planet Kinniku. Furthermore, in Kinnikuman Nisei it is established that he created the Niku Curtain and founded the Royal Kinniku Family.