He is the first Oboro ninja to appear on the scene. He attacks Ayame and Sakon first and then sends his crow demons to do his dirty work. Ayame and Sakon slaughter his minions, but he escapes. He comes back later at Hagakure-no-Sato and attempts to kill Ayame, but fails and accidentally ends up killing Kikyo instead. Wears a red cloak, has a iron mask with a scar on his face, white teal hair, and utilizes beads to attack. Is killed by Ayame.
Didn't know he was Oboro, and is actually helpful to Ayame, Sakon and Ryoma. He guides them throughout the story. He is a monk who utilizes Buddhist wards to protect. Is Impale by a peace of wood and killed by Ranmaru.
He was the one who gave Ayame the Short Sword of Sorcery. Ayame's brother who was killed in the attack on Kasumi. Since his and Kikyo's death, Ayame vows to destroy the three-headed demon who killed her brother and her friends.
Ranmaru is a sort of "alien". He descended upon the earth 500 years before the plot from the meteor which splits the sky in half, along with the Host of Oboro. He controls Nobunaga, and, thinking he will gain ultimate power, Nobunaga follows all of the advice which Ranmaru gives him. However, Ranmaru was tricking Nobunaga into allowing Ranmaru to rule the Earth. Ranmaru is the one who foretold the prophecy (the "Yotoden") and gave the villages of Kasumi, Hyuga, and Hagakure-no-Sato the Swords of Sorcery in the first place. He opens the gate to the underworld, but is destroyed by the combined efforts of Ayame, Sakon, and Ryoma and their respective Swords of Sorcery.
He possesses Kayo and causes her to kill her own comrades at Iga. He has blue hair, and comes out of Kayo's back. Is killed by Ryoma. His most powerful ability is to cause the instantaneous explosion of enemies heads.
Ryoma's younger sister who died in Ayame's arms. Before her death, Kikyo befriended Ayame and tried to comfort her when she was upset and reminiscing about her tragic past. She is killed by Jinnai Saegusa when she took four finger darts meant for Ayame.
The sole survivor of Kasumi village. Kasumi was destroyed when the three-headed monster attacked. Ayame (she transformed the feminine name "Ayame" into "Ayanosuke" after her village was destroyed) is a strong fighter, but gets emotional at times. She wields the Short Sword of Sorcery.