Kyouko Equuleus
小馬座(エクレウス)の響子
About
Kyouko is Shouko's elder sister and the previous Equuleus Saintia.
(Source: Seiyapedia)
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Kyouko sacrifices herself in order to avoid Eris of possessing Shouko. Because of this act, Eris possesses Kyouko's body instead


