Tsuneko Ishida lost both her parents in an accident, with her only company being her grandfather. When her tears of grief bring her teddy bear, Corundum, to life, she now has the task of defending anyone in peril by transforming into the dazzling Jewel Marquise.
- Airi Eino as Tsuneko Ishida/Jewel Marquise.
- Mayu Yoshioka as Hirono Yukimoto, Tsuneko's closest friend.
- Kokoro Terada as Corundum, a talking teddy bear and Tsuneko's advisor.
- Yuzuru Fujimoto as Tsuneko's grandfather.
- "シンデレラ症候群 (Cinderella Shōkōgun)" by KOTO
Lyrics by KOTO
Composition and Arrangement by Kissa Sasaki
- "CLOUD BOSSA" by Frenesi
Lyrics, Composition and Arrangement by Frenesi