Yukari Itsumura, a first-year student at Suzumura Girls' Junior High, balances her studies with membership in the idol unit Ortensia. Her appearance features striking black hair styled in high twin-tails, straightened bangs, and gentle azure eyes, often complemented by a beret, white stockings with distinctive patterns, and outfits mirroring her niece Haruka’s style. Exuding a bright, frank personality, she charms others with lively speech and an energetic demeanor.

Despite being Haruka’s younger aunt, Yukari shares a close bond with her niece, relying on Haruka to tie her hair due to her aversion to hairstyling. Her preferences lean toward savory snacks like meat and rice crackers, alongside a fondness for ferris wheels.

Yukari’s talent shines in her seamless synchronization of singing and dancing, a cornerstone of Ortensia’s performances. Later, she broadens her idol career by joining Aster Reve with Sono Mizushino in *Re:Stage! Prism Step* Chapter 66. When Haruka’s parents relocate overseas, Ortensia’s farewell live performance tests Yukari’s adaptability, highlighting her evolving resolve to persist in idol activities. Her journey across media traces a shift from a cheerfully reliant junior idol to a self-assured performer navigating new collaborative challenges.