Ilkuubo  

, イルクーボ

This individual is the most potent among the five Dark Kings and serves as their right-hand man. With his abilities, he can thwart various attacks including the Marble Screw. However, despite this strength, he isn't as resilient as Gekidrago, meaning a direct hit will still cause him harm. He first emerged on Earth but only began fighting seriously after Kiriya returned to the Dark Zone. In episode 24, he was defeated, but briefly reappeared in episode 25 where he engaged Pretty Cure in an intense battle and transported them to the Dark Zone in a more formidable (and powerful) manifestation. He is characterized by his large size, pale skin, bald head with pointed ears, dark-rimmed eyes similar to Kiriya's, wearing a white robe, and carrying a purple prism stone.