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Nuriko first appears disguised as "Korin" in Emperor Hotohori's harem, which Hotohori never visits except to welcome new maidens. "Korin" was in fact Nuriko's younger sister, who died at a young age; he began behaving and dressing like her to keep her memory alive. Born in Eiyō, the capital of Konan, Nuriko possesses superhuman strength and is later granted a pair of bracelets that transform into strength-increasing armbands by Taiitsukun. He is 18 years old. His true name is Ryuuen Chou , based on the star Willow .

Source from Wikipeida