The protagonist, a heroic spirit who uses a Servant Card to transform into the appearance of Sakamoto Ryoma. He has calm, strong, and gentle heartbeat. He is not human but possesses abilities far beyond normal humans. He is seeking information about Ibaraki Dōji and aims to capture demons alive to gain the Demon Slayer Corps' trust. He is described as a seasoned screenwriter who can fabricate backstories for his illegal-resident identity.
