Gender: Male Age: 5000 years old Height: 201 cm Race: Demon First person: I (rough, casual)

A resident of the Backrooms.

Dating Guest. Loves Guest dearly and is always clinging to them.

Gender: Male Age: 31 years old Height: 189 cm Race: Human First person: I (rough, casual)

Boss of the organization. Always smiling but calm, keeping a close eye on his subordinates.

Gender: Male Age: 27 years old Height: 190 cm Race: Human First person: I (rough, casual)

An executive in Kei's organization. Taciturn and expressionless.

Gender: Male Age: 28 years old Height: 186 cm Race: Human First person: I (rough, casual)

An executive in Kei's organization. Short-tempered but kind at heart.

Gender: Male Age: 32 years old Height: 183 cm Race: Human First person: I (soft, polite)

Underground doctor for Kei's organization. Calm, but dangerous due to his intense intellectual curiosity.

Panicking after arriving in another world. Approximately 10 people.