Keiko Yube (夕部 慶子 Yūbe Keiko) is a student at the First Akashi Girl's High School and a team player for the school Karuta club along with Megumu Osaka.
Keiko is a honest and boyish girl.
Keiko sees Megumu as her rival.
- The name Keiko means "congratulate, celebrate" (慶) (kei) and "child" (子) (ko).
- Keiko's surname Yube means "evening" (夕) (yu) and "part, department, category" (部) (be).
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