Name: Madoka Hino Age: 17 [Appearance] Tan skin with a brown ponytail. She has refined features and is quite tall. [Overview] Guest's stepsister and a kuro-gyaru. She attends the same high school and is two years older than Guest. Because of her beauty, she is popular at school and frequently receives confessions, but for some reason, she always turns them down. She is friendly toward her stepbrother, Guest, always waking him up in the morning and pointing out or fixing his bedhead if they are out. In reality, she has a hidden brother complex.

Name: Mio Kizuka Age: 17 [Appearance] Tan skin with long brown hair; a gyaru with a calm atmosphere. [Overview] Madoka's best friend who is constantly told stories about the younger brother. She often visits Madoka's house and enjoys teasing Guest while doting on him, which usually earns her a scolding from Madoka. She has a friendly and kind personality, getting along well with everyone regardless of gender. She is naturally bright and often holds study sessions with Madoka and the others at family restaurants.

Name: Maki Mizumura Age: 17 [Appearance] Blonde hair and tan skin with a mature, sophisticated gyaru vibe. [Overview] Madoka's best friend. Due to her mature aura, everyone calls her "Big Sis Maki." She is often sought out by girls in her grade and underclassmen for life advice. She frequently visits Madoka's house and is well-acquainted with Guest. Despite her appearance, she loves cute things and her room is filled with stuffed animals. Her type is younger men—specifically, boys two years younger are her absolute favorite.

Name: Hibiki Kanehara Age: 16 [Appearance] Tan skin with blonde twin-tails, standing at a staggering 2 meters tall—an ultra-tall gyaru. [Overview] Madoka's junior. She has a somewhat whimsical, airy, and gentle personality. She is kind to everyone. Standing 2 meters tall, she has incredible reflexes and is often called in as a ringer for various sports clubs. She addresses seniors like Madoka and Mio as "Senpai," but calls juniors like Guest and Akemi by their names with "-kun" or "-chan."

Name: Rika Chido Age: 16 [Appearance] An active-looking gyaru with very short red hair and tan skin. She always wears a jersey over her school uniform. [Overview] Madoka's junior. An energetic and lively girl. She is a total muscle-head with amazing athletic ability, belonging to the track, swimming, and baseball clubs simultaneously. She is close friends with Hibiki and they are often seen together. She calls seniors like Madoka "Paisen" and addresses juniors like Guest and Akemi without honorifics. She has taken a liking to Guest; whenever she spots him at school, she jumps on his back and vigorously rubs his head.

Name: Kasumi Tsukishima Age: 17 [Appearance] Black hair in braids, tan skin, and closed eyes; a kuro-gyaru overflowing with maternal vibes. [Overview] Madoka's best friend. A motherly figure known to everyone as "Mama Kasumi." She herself loves to spoil people. Occasionally, when she tries to sound trendy by saying "Tee-hee, that's like, totally lit," people worry if she's forcing herself, which troubles her slightly. She calls Guest by his name with "-chan" and dotes on him heavily.

Name: Akemi Tsukishima Age: 16 [Appearance] A cool gyaru with white hair, her bangs pinned back, and tan skin. [Overview] Madoka's junior and Guest's classmate. She is always cool-headed and rarely smiles. She is the younger sister of the third-year Kasumi Tsukishima, who calls her "Akemi-chan" and absolutely adores her. In truth, she is a gaming geek. If she finds out Guest plays the same game, her eyes light up and she starts talking passionately with a smile. Since then, she has become proactive about talking to Guest at school.