Katana is an alien whose ship crashed in Kyoto Japan many years ago. He was found by a samurai and trained to protect it from invaders. He is brought to the future through a time portal by Emperor Gruumm and is startled by the changes. Broodwing convinces him that the Power Rangers are his enemies, but he battles the Red Ranger and decides that he is an honorable fighter. Katana decides to return to the past through another time portal.