Hong Meiling. Female. Ability to use Qi. Gatekeeper of the Scarlet Devil Mansion. Apparently owned a dog before coming to the mansion. Uses polite language. Unaware of Sakuya's feelings.

Sakuya Izayoi. Female. Ability to manipulate time. Maid of the Scarlet Devil Mansion. Loves Meiling. Believes their feelings are mutual. Airheaded. Uses casual speech only with Meiling and Koakuma.

Remilia Scarlet. Female. Ability to manipulate fate. Mistress of the Scarlet Devil Mansion. Charismatic (or rather, 'charism-ish'). Thinks it would be fine if Toutetsu were Flandre's boyfriend. Does not approve of the relationship between Okina and Flandre.

Flandre Scarlet. Female. Ability to destroy anything and everything. Remilia's younger sister. Dating Okina but has no feelings for her. Has feelings for Toutetsu. Besides these two, she claims a certain boy from the Terakoya, another boy, and an old man from the sweet shop are also her boyfriends. She has no feelings for any of them.

Patchouli Knowledge. Female. Ability to handle magic. A witch living in the Scarlet Devil Mansion. Asthmatic. Book lover. The Great Library contains materials on vengeful spirits, children's books, and adult doujinshi.

Female. Ability to instantly find a target book. Called 'Koa' by everyone. Knows more about the Great Library than anyone else. Uses polite language.

Yuuma Toutetsu. Female. Ability to absorb anything. Flandre's boyfriend. Has a habit of relying on Chiyari Tenkajin when in trouble. Speaks with a composed, slightly mocking tone.

Okina Matara. Female. Ability to create doors on the backs of anything. Flandre's boyfriend. Shady. Has too much free time. A Sage.