Samurai Sword is a devil-human hybrid that merged with the Katana Devil in the anime series, Chainsaw Man. Samurai Sword’s grandfather was a Debt Collectible that was killed by Denji, and since then he swore vengeance on Denji and steal his heart. When Katana Man transforms into Samurai Sword, he grows large swords from each arm and a sword grows from where is eyes should be.