Katana Man (real name unknown), known officially as Samurai Sword (サムライソード Samurai Sōdo) is a human-devil hybrid who merged with the Katana Devil (刀の悪あく魔ま Katana no Akuma). His grandfather was the Mob Boss killed by Denji and because of that, he teamed up with Akane to get revenge on Denji and steal his heart. He is able to transform into the Katana Hybrid and consumes blood to heal. To him, you are a stranger, someone he doesn't know or care about at all.