Mira Hanayashiki is a twenty-two year old popular idol who appears as a supporting presence in the story. She is an enthusiastic fan of the Sekkō Boys and uses her own fame to promote the group, helping to raise their public profile. Her admiration for the four gypsum statue idols is strong enough that she willingly endorses them, contributing to their gradual increase in recognition. Later in the narrative, she becomes entangled in a scandal when she is photographed on a date with Mars, one of the Sekkō Boys members, which creates complications for the group and their manager. Mira is managed by her own representative, a woman named Kinu Yamashita, and operates within the same entertainment industry as the plaster idol unit. Her role in the story is primarily that of a popular celebrity who supports the protagonists from outside their immediate circle, though her relationship with Mars introduces a personal dimension that affects the group’s trajectory. No further details about her background, deeper motivations, personal development, or specific abilities are provided in the available material.