Suma

One of the three brides of Tengen. 19 years old. A timid and tearful female ninja. She often quarrels with the spirited Maki over Tengen.

She infiltrated the "Tokito-ya" as a courtesan (later promoted to an oiran) to investigate the demons lurking in the red-light district but was discovered by Daki and sealed within a Blood Demon Art sash. She was confined in an underground food storage but was rescued by Inosuke.

According to the second fanbook, originally it was Suma's sister who was supposed to marry Tengen, but Suma insisted on going herself, crying and breaking through the sliding doors, so it ended up being Suma. She seems to like both men and women, as after the final battle, she came to visit Tanjirou but ended up hugging Nezuko instead, showing her affection.