Shupe Gushiken, a 16-year-old high school first-year from Naha City, Okinawa Prefecture, celebrates her Leo birthday on August 22nd and stands 160 cm tall. Witnessing a plain girl transform into a stunning idol on television stirred her resolve to pursue an idol career herself, shaping her dedication. Her mother's profession as a makeup artist fuels Shupe's profound passion and considerable skill in applying transformative makeup, both to herself and others, reflecting her family background. This special skill contrasts sharply with her distaste for celebrity no-makeup selfies.

Personality-wise, Shupe exhibits a slightly abrasive demeanor and speaks her mind directly. Despite this outward brusqueness, she demonstrates appreciation for fellow group members, like Hiyo Yukino, in significant moments. Her Okinawan heritage is integral, frequently expressed through the regional phrase "Nankurunaisa."

Within her idol unit, Shupe's theme color is brown (#8B4807). She participates in group merchandise, such as acrylic key holders featuring her likeness alongside musical motifs. Her character song, "Kagayake Make Up Shine," reinforces her association with makeup through its title and lyrical themes, set to a jazzy brass arrangement.