An evil monk chasing after Momohime who has a deep-seeded grudge against Jinkuro. Before his baptism, he was a swordsman and was crippled in a fight with Jinkuro before his foe lost his body.

In Momohime's first ending, upon seeing Fudo-Myoou, Rankai changes his ways and becomes a traveling monk to atone for his sins. While Momohime's first ending has him accompanying her, Rankai is also seen in Okoi's first ending when he visits a shrine where the powerless Miike now resides.