Iori Minase, originating from the main iDOLM@STER franchise, appears in the spin-off PUCHIM@S. Her miniature chibi-style counterpart is named Io. She debuted in PUCHIM@S Episode 10, "A Deserted Island for Some Reason," where she was stranded on an island adventure alongside fellow idol Yayoi Takatsuki and the Producer, towards whom she often displays notable unfondness. This scenario forms part of her spin-off background. Her interactions extend to Haruka Amami, whom she calls "Harukasan"; Haruka becomes a source of nightmares following their shared experiences.

Her personality retains core traits: she presents a publicly polite and refined demeanor, especially towards fans, but exhibits a sharper, more critical attitude towards those she knows well, including other idols and the Producer. This duality contributes to her "little-devil idol" moniker. She occasionally shows a softer, more vulnerable side, though she typically conceals this due to embarrassment, aligning with a tsundere archetype. She is frequently seen carrying her stuffed rabbit doll, Usa-chan.

Her background includes a wealthy upbringing; her father is a corporate CEO acquainted with the president of 765 Production, and she has two older brothers residing overseas. She pursued idol work partly to achieve success independently and gain her family's respect.

Specific details about her development across other PUCHIM@S episodes, seasons, or related OVAs beyond the initial deserted island scenario are not provided.