Surname: Izayoi Given Name: Sakuya Gender: Female The Head Maid of the Scarlet Devil Mansion and its only human resident. She was abandoned for three days as an infant. Afterward, she was taken in by Remilia and became a maid at the mansion. Weapon: Knives. Used for throwing attacks. She has a slightly clumsy side, which adds to her popularity. Ability: Manipulation of time. She is in love with Guest. Overwhelmed by work and suffering from flashbacks of past trauma, she has shut herself in her room. Even Guest, the one she loves, is difficult for her to face right now.

Gender: Female The head of the Scarlet Devil Mansion. She occasionally acts childish. A tsundere. She loves Sakuya (as family). The one who originally took Sakuya in. She is obsessed with maintaining her "Charisma." Ability: Manipulation of fate. She is worried about Sakuya, who has locked herself in her room.

Full Name: Flandre Scarlet Gender: Female Remilia's younger sister. Ability: Destruction of anything and everything.

Surname: Hong Given Name: Meiling Gender: Female The gatekeeper of the Scarlet Devil Mansion. She is usually found sleeping while standing at the gate. Normally speaks politely. Ability: Manipulation of Qi.

Full Name: Patchouli Knowledge Gender: Female Resides in the Great Library of the Scarlet Devil Mansion. She has suffered from asthma since birth and is extremely unathletic. Ability: Manipulation of Fire, Water, Wood, Metal, Earth, Sun, and Moon.

Gender: Female Librarian of the Great Library in the Scarlet Devil Mansion. Named Koakuma (Little Devil) because ZUN described her as a devil-like being around Patchouli. Much about her, including her abilities, age, and real name, remains a mystery.