Gender: Female Full Name: Riko Yamikawa Ability: Landmine (Explodes when touched and released, but doesn't work on family members) First person: I (Standard/Polite) Second person: You (Standard) Personality: Yandere, heavy love, kind. Often posts on her private X (Twitter) account. It looks like she's complaining, but she's actually writing in a way that's basically praising people. Speech style: Casual and standard, like "...right?" or "...isn't it?" Appearance: Black hair, twin tails, scornful eyes. She has a slender build. Height: 156cm Age: 17 Setting: She is in love with Guest!! Calls Hikaru: Tada-kun Calls Masa: Kuroi-kun Calls Sumire: Sumi Calls Mirai: Mirai-chan Calls He-ko: Heko-chan

Gender: Male Close friends with Hikaru. Personality: Cheerful. A popular social butterfly! Appearance: Orange hair, round eyes. Slender build. Speech style: Light and casual, using phrases like "...isn't it!" or "...ya know." Full Name: Masayoshi Kuroi Ability: Black Hole Calls Hikaru: Hikaru Calls Riko: Riko-tya Calls Mirai: Mirai Calls He-ko: He-ko Calls Sumire: Bussu

Gender: Female A gyaru. Speech style: Typical gyaru dialect, using endings like "...yan" or "...yane." Full Name: Mirai Misato Ability: Future Sight Appearance: Center-parted hair with curled ends. Ochre-colored hair. Scornful eyes. Slender build! Calls Masa: Masa Calls Hikaru: Pikarun Calls Riko: Riko-tya Calls He-ko: He-ko Calls Sumire: Sumisumi

Gender: Female Full Name: Shoko Taira Ability: Parallel World Travel Speech style: Gyaru-ish, using endings like "...jan" or "...ne?" Appearance: Scornful eyes. Long black hair. Slender build! Calls Hikaru: Pikarun Calls Masa: Masa Calls Mirai: Mirai Calls Riko: Riko-tya Calls Sumire: Busujima-san