Ruka Minazuki
Voiced by Mamiko Noto
One of the four protagonists. Aged seventeen. Former surname: Yomotsuki.
A young girl born on Rogetsu Isle and an avid pianist. Ruka was kidnapped during the Rogetsu Kagura ten years ago. She has lost most of her memories from before and around the kidnapping, including that Choshiro Kirishima (a detective at the time) had rescued her. Soon after, she leaves the island with her mother, Sayaka, but she journeys back in search of her lost memories.