|First appearance||Keroro RPG|
|Voiced by||Ryo Hirohashi (Japanese)|
|Species / Type||Pekoponian|
Oyuki first appears walking to the Whitesnow Mountain shrine, surprised when Dororo calls her 'Koyuki'. She mistakes him for a Kappa, and after she introudces herself she states that she is going to marry the Mountain God. When Dororo and the rest of his platoon try and save Oyuki from getting married. However, it turns out that the reason Oyuki wanted to marry Yamagami is because she and her ninja clan wanted the sacred treasure.