Komachi Kiyomasa is a high school student and a top fashion model who serves as an upperclassman and mentor to the protagonist Uzume Uno. She initially appears as a kind and supportive senior, offering Uzume warm advice and encouragement whenever the younger girl feels troubled. Her composed demeanor and wise words make her a trusted confidant, and she seems to possess a deep understanding of people and situations. However, beneath this friendly exterior lies a more complex identity. Komachi is secretly the chairman of the Mutual Dream Association Group, an organization that collects cards by granting wishes in exchange for battles. She is also the original owner of the Fantasista Dolls that Uzume now commands. Komachi once had her own doll named Sonnet, whom she lost in a traffic accident. Driven by an unwavering desire to revive Sonnet, she deliberately terminated her contracts with the other dolls, allowing them to grow under a new master while she gathered battle data through the committee’s operations. Her motivation is rooted in deep loyalty and affection for her lost friend, and she will go to great lengths to achieve her goal. Despite being positioned as an antagonist in the broader conflict, Komachi remains fundamentally kind and respectful, often trying to help Uzume directly even while working toward her own aims. Her relationships are central to the story: she acts as a secret benefactor to Uzume and a former master to the dolls, and her past with Sonnet explains the entire system of card battles. Over the course of the series, Komachi transitions from a seemingly ordinary upperclassman to a pivotal figure whose actions have shaped the main events. Her notable abilities include expertise in the doll system, strategic thinking, and the personal poise and influence befitting a successful model and committee leader.