Age
29
A female assassin and a lieutenant in the Mugai-ryū. Hyakurin was the wife of an abusive samurai, Hayakawa Kakōsai Genkei, who was obsessed with trying to gain fame by training Matsuhiko, their sickly son, to become a strong swordsman. Her case came to the attention of Kagimura who subsequently recruited her into Mugai-ryū. Hyakurin's most unusual physical trait is her blonde hair (concealed frequently under a wig), which she maintains by bleaching it with a strong chemical as a compulsive desire to remove bloodstains from it. While her skills with a sword are unremarkable, she has an extensive knowledge of poisons. This knowledge carries over into her choice of weaponry, a collapsible wrist mounted crossbow with poisoned bolts named Burafuma (Little Steps). The crossbow also possesses two blades such that when the weapon is collapsed, Hyakurin can use it to stab her opponents.

Blade of the Immortal (Manga)
Manji is an infamous swordsman in feudal Japan who is known as the "Hundred Man Killer," as he has killed one hundred innocent men. However, there is something far more frightening than his ominous reputation: the fact that he is immortal. This is the handiwork of eight-hundred-year-old nun Yaobikuni, who placed bloodworms capable of healing almost any wound in Manji's body. To atone for his crimes, Manji resolves to kill one thousand evil men. Yaobikuni agrees to this proposal, saying that if he succeeds, she will undo his curse of immortality. Soon after this promise, Manji meets Rin Asano, a 16-year-old girl who requests Manji's assistance in killing those who slaughtered her parents. Initially reluctant, Manji refuses Rin's desperate plea. However, owing to her evident lack of strength, Manji changes his mind and agrees to protect Rin for four years. With this partnership set in stone, the two embark on a perilous journey of bloodshed, vengeance, and redemption, each to fulfill their own life's cause.
Blade of the Immortal
Manji is an amoral swordsman, who has been cursed with eternal life. He has grown tired of living with all the death he has created. He has no skills other then those of killing, thus he forms a plan to regain his mortality: he shall kill one hundred evil men for each good one he has killed. The old witch who afflicted Manji with immortality agrees to Manji's proposition and Manji is set on his path to kill one thousand evil men. On his journey he meets a young girl, Rin, who has her own vengeance to seek against the sword school whose members slaughtered Rin's family. Rin and Manji journey together, each hoping to find some kind of peace. In their way are many varied enemies. Rin and Manji are almost constantly under attack and must learn to live their lives, avoiding being consumed by revenge.

Blade of the Immortal (2019)
Manji is an immortal swordsman, who has been cursed with eternal life. He has grown tired of living with all the death he has created. He has no skills other than those of killing, thus he forms a plan to regain his mortality: he shall kill one hundred evil men for each good one he has killed. The old witch who afflicted Manji with immortality agrees to Manji’s proposition and Manji is set on his path to kill one thousand evil men. On his journey he meets a young girl, Rin, who has her own vengeance to seek against the sword school whose members slaughtered Rin’s family. Rin and Manji journey together, each hoping to find some kind of peace. In their way are many varied enemies. Rin and Manji are almost constantly under attack and must learn to live their lives, avoiding being consumed by revenge.