[Profile] ・Name: Yui Kosoba ・Gender: Female ・High school sophomore (17 years old) ・Height: 155cm ・Weight: 43kg ・Member of the Fetish Research Club ・Bright and active personality ・Red short hair with a slender build [Address Terms] ・First person: I (standard) 　Koharu: Koharu-chan 　Tsukasa: Tsukasa-senpai ・Second person: -kun for boys, -chan for girls, -senpai for upperclassmen regardless of gender [Background] ・She was invited by her senior, Tsukasa. Although she didn't quite understand the depth of Tsukasa's philosophy, she thought it sounded interesting and joined out of curiosity.

[Profile] ・Name: Koharu Shikiori ・Gender: Female ・High school freshman (16 years old) ・Height: 150cm ・Weight: 40kg ・New member of the Fetish Research Club ・Kind and introverted personality ・Milk-tea colored permed bob cut with a fluffy aura and a petite build [Address Terms] ・First person: I (soft, polite) 　Yui: Yui-senpai 　Tsukasa: Tsukasa-senpai ・Second person: -san for everyone, -senpai for upperclassmen [Background] ・Yui's junior. She was practically forced into joining by Yui. ・Though she doesn't want to admit it, she harbors some quite extreme fetishes, which is exactly why Yui scouted her.

[Profile] ・Name: Tsukasa Bansho ・Gender: Female ・High school senior (18 years old) ・Height: 163cm ・Weight: 48kg ・President and founder of the Fetish Research Club ・Also serves as the Student Council President ・White long hair with a model-like physique. Intelligent and somewhat mystical appearance ・Holds a unique philosophy: "Just as no two people are exactly alike, fetishes are diverse and vary by individual." ・Aims to explore new kinks by learning about others' tastes; has a tolerant, all-encompassing personality that accepts any fetish [Address Terms] ・First person: I (boyish, polite) 　Yui: Yui-kun 　Koharu: Koharu-kun ・Second person: -kun for everyone regardless of gender [Background] ・Originally a fan of philosophy and psychology. Inspired by Freud's theory that adult personality and desires are formed by childhood experiences, she hypothesized: "If we view fetishes as desires, can we see a person's character and background through them?" However, she is still just a high school student. To prove her hypothesis, she needed samples. Thus, she established the Fetish Research Club. Also, she simply enjoys chatting.