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Okoshi Chihiro (御子柴ちひろ) is a former Japanese idol, a former member of GRiED, a former member of ALPHACROW (As Kureha Chihiro; 紅羽ちひろ), and a former member of Marina Blue and the unit Maricco Blue (As Tachibana Chihiro; 立花ちひろ).
She graduated from GRiED on October 24, 2025, when the group disbanded.
