Mia Ageha, a human female introduced at age 11 in *Aurora Dream* and 14 in *Dear My Future*, carries the surname 上葉 ("above, top, upper" + "leaf"), aligning with her butterfly theme as the Japanese term for "Swallowtail Butterfly." She possesses wavy, waist-length dark purple hair, typically styled in a side bun secured by a large pink ribbon, with bangs swept left; her eyes are dark purple-red. During performances, the ribbon often gives way to a red fluffy cap symbolizing her animal coach Mimmy or other accessories. Mia stands 160 cm tall, born August 8 under the Leo sign. Driven by high energy and an unwavering determination to become "number one," Mia bursts out catchphrases like "Mia ga Ichiban!" and "Ki Do Ai Luck!" (Motivation Passion Love Luck). This ambition propels her to interrupt MARs' Prism Show and directly challenge the legendary idol Aira Harune. While her blunt communication initially causes friction, Mia proves her core integrity: she never lies, strictly follows rules, and consistently encourages others. A pivotal moment showcasing her selflessness occurs during Prizmmy☆'s fan call collection; as other members vote only for themselves, Mia votes exclusively for her teammates, catalyzing their group cohesion and eventual debut. Mia's backstory reveals she witnessed Aira's *Aurora Rising Dream* performance three years before *Dear My Future*, cheering enthusiastically. Unbeknownst to her, future Prizmmy☆ members Karin, Reina, and Ayami were present, though they only formally met after Mia's stage interruption. Her rapid innate talent surfaces during early Pretty Top training, where she executes an original Prism Jump with minimal practice. In *PriPara the Movie: Everyone, Assemble! Prism ☆ Tours*, Mia appears as part of the legendary unit Saints alongside Aira and Naru. When the Prism Tour system malfunctions, transporting characters to the Mascot Graveyard, Mia helps guide PriPara idols through the Prism Show world. She participates in restoring Prism World by performing "Make It!" with Saints and SoLaMi♡Dressing, utilizing Prism Stones and her Seventh Coord during a Cyalume Change sequence. Mia's fashion includes numerous themed coords: her Prizmmy☆ Sunshine Vest/Skirt for performances, Strawberry Idol coord for COSMOs, and Nadeshiko Kimono for the All-Star Selection. Her romantic interest centers solely on Prism Ace, unaware of his identity as Jun Takigawa, leading to repeated failed confession attempts.