Moka Gotō is a first-year student at Fujimi High School and serves as the manager of the school’s soccer club. She has short black hair and blue eyes, and is notably small in stature at 151 centimeters. Her motivation stems from a long-standing crush on Aoyama that began in elementary school, after she had a single conversation with him that she has never been able to forget. Her feelings are intense and have led to increasingly obsessive, stalker-like behavior. She constantly watches over Aoyama, and her dedication to his well-being is the central drive behind her actions.

In the story, Moka initially works in secret by sneaking into the soccer clubroom to clean it, hoping to help Aoyama in her own way. When she is discovered by the team, she officially becomes the club manager. Her role is that of a devoted, if overzealous, supporter who goes to great lengths to maintain a clean and safe environment for Aoyama, who suffers from mysophobia. She is also fiercely protective, using a distinctive floral-patterned baseball bat studded with nails to ward off anything she perceives as dirty or threatening to him. Additionally, she possesses an unexpected skill for lock picking, which she uses to rescue Aoyama when he is trapped.

Key relationships include her unrequited affection for Aoyama, which she keeps mostly hidden but acts upon through her vigilant guardianship. She views other girls who show interest in Aoyama, particularly Mio Odagiri, as rivals. Her interactions with the rest of the soccer team are cordial, but her primary focus remains on Aoyama. Throughout the series, Moka’s character does not undergo major transformation; she remains consistent in her intense devotion and quirky methods of expressing it. Her notable abilities are her meticulous cleaning habits, her lock-picking talent, and her readiness to use her customized bat as both a tool and a weapon in service of protecting Aoyama’s cleanliness and peace of mind.