Ray Sky (レイ スカイヤー Ray Skyer in Japan) is a Lightning Sky robo and a member of the Ray Series. It appeared in Custom Robo GX and Custom Robo Arena. It is a Normal Style robo in GX and a variable style in Custom Robo Arena depending on its color. It is used primarily by the Hero in Custom Robo GX after his X-Ray model was modified into a Ray Sky by the Nikaido Group. * Blue: Power * Red: Armor * White: Speed The blue version of Ray Sky is the only version available for non-Japanese players. The version is AIRS.