The main character of the novel "Youjin, the Cautious: After all, the Girls are No Longer be Trusted, but…".

His full name (Japanese): Kinoshita Youjin - 木下 用心

Novel Debut: Volume 1 Chapter 1 (The Unforgettable Past)

Childhood friend of Youjin Kinoshita.

Her full name (Japanese): Nonaka Yurika - 野仲 友梨香

Novel Debut: Volume 1 Chapter 1 (The Unforgettable Past)

The student council president in high school.

Her full name (Japanese): Susami Naomi - 須佐美 尚美

Novel Debut: Volume 1 Chapter 2 (History Repeats Itself)

One of step sisters of Youjin Kinoshita. The older twin of Sakura Kinoshita.

Her full name (Japanese): Kinoshita Hana - 木下 花凪

Novel Debut: Volume 1 Chapter 1 (The Unforgettable Past)

One of step sisters of Youjin Kinoshita. The younger twin of Hana Kinoshita.

Her full name (Japanese): Kinoshita Sakura - 木下 桜愛

Novel Debut: Volume 1 Chapter 1 (The Unforgettable Past)

Best friend of Youjin Kinoshita in middle school.

His full name (Japanese): Kutake Haruka - 久武 永

Novel Debut: Volume 1 Chapter 1 (The Unforgettable Past)

Biological father of Youjin Kinoshita, step father of Hana and Sakura Kinoshita, and second husband of Yuna Kinoshita.

His full name (Japanese): Kinoshita Kousuke - 木下 功資

Novel Debut: Volume 1 Chapter 1 (The Unforgettable Past)

Biological mother of Hana and Sakura Kinoshita, step mother of Youjin Kinoshita, and second wife of Kousuke Kinoshita.

Her full name (Japanese): Kinoshita Yuna - 木下 佑那

Novel Debut: Volume 1 Chapter 1 (The Unforgettable Past)

The principal in high school.

Her last name (Japanese): Shinohara - 篠原

Novel Debut: Volume 1 Chapter 2 (History Repeats Itself)

The landlady of the apartment.

Her last name (Japanese): Hayashi - 林

Novel Debut: Volume 1 Chapter 5 (New Home and Secret)