Shiori Yumeoji is a Stage Girl from the Shoujo☆Kageki Revue Starlight universe, introduced in Re:LIVE. She holds the title of "Frau Jade" at the prestigious Siegfeld Institute of Music and is the younger sister of Fumi Yumeoji.
Shiori's basically the grounded one among her Siegfeld peers. Despite being younger, she often ends up as the voice of reason—the person others turn to because she actually knows what's going on. Fans often note her as surprisingly mature and level-headed compared to her classmates.
She wasn't always a standout performer, though. As a kid, she dealt with serious health issues that kept her from participating in longer lessons and training sessions. But she pushed through that and eventually became the accomplished Stage Girl she is today. It's kind of her defining thing—overcoming those physical limitations through sheer determination.
Still, there's something weighing on her: her older sister Fumi left Siegfeld without explanation, and Shiori clearly hasn't made peace with that. It's a lingering source of trouble for her despite everything else she's accomplished.
Content compiled by AnimeList.moe from publicly available sources.