Rey is a fictional character from Kamen Rider Kiva who serves as one of the Checkmate Four, a group of Fangire nobles. He is a refined, confident, and dangerous antagonist aligned with the Fangire side of the conflict. As Kamen Rider Rey, he uses his abilities to hunt and fight with elegance and precision, standing as a major enemy to the series’ heroes. His role is important in expanding the lore of the Fangire hierarchy and the internal power struggles within their ranks.