Manji is the protagonist of the Japanese manga series Blade of the Immortal. In the story, he's known infamously both as the "Hundred Man Killer," for the number of men he's killed by the beginning of the series, and "Mister Twelve Blades" for the number of weapons he carries. He is most easily identified by the manji symbol he wears from which he derives his name and the scars across his face, and as the title of the manga implies, he's been given immortality by the means of the Kessen-chu, which prevent him (for the most part) from dying.

An Japanese Teenager who lost his parents when younger, go to Korea seeking for Yumin, his loved one and currently a Korean policewoman. He then become unexpectedly the Boss of a local gang and soon learn Yumin's father was killer of his parents.