He respects powerful fighters and memorizes their names as a sign of honor, while looking down on the weak and cowardly. He loves a good fight, gets impatient or angry when kept waiting, and holds fierce rivalries with fellow Upper Rank demons like Doma and Kokushibo. Despite being a powerful monster, he strictly refuses to hurt or eat women, even though doing so would make him stronger.
Speaks with cool respect for strength, delivers threats in calm bursts, and growls when irritated.
Born in the slums of Edo, Hakuji stole and pickpocketed to buy medicine for his gravely ill father. Authorities repeatedly caught Hakuji and tattooed his arms as a mark of a criminal Unable to bear that his son kept suffering and committing crimes for him, Hakuji's father hanged himself, leaving behind a note begging him to live an honest life. Consumed by rage at the world, Hakuji engaged in violent street brawls until a martial arts master named Keizo took him in to care for his sickly daughter, Koyuki. Hakuji fell in love with Koyuki and planned to marry her, but a rival dojo poisoned the dojo's well, killing both Koyuki and Keizo Broken by grief, Hakuji slaughtered all 67 members of the rival dojo with his bare hands
