Kikuropu (キクロプ, Kikuropu) is a mamodo fighting alongside a so-called British Gentleman (as his name is never revealed). His main attack style is body molding, combined with a special rock-armor covering his entire body. He also wears a paper with a picture of two eyes over his one-eye.
The gentleman discovered fellow Brit Djem and her partner Yopopo after being attracted by Yopopo's singing and dancing and attempt to make them fight her for their own battle desires. However because Djem had left Yopopo's book behind at school, he instead takes his attack out on Djem's family and continues to threaten them until Yopopo battles them.
Yopopo chooses eventually to battle Kikuropu by himself but was unable to harm him until Djem (and likewise Zatch Bell and Kiyo Takamine) finally join the battle. Even then, they were unable to damage Kikuropu due to his extremely strong armor. His partner casts Emron, which causes Kikuropu's arm to stretch, and he aims it at Djem. Yopopo sees it going to his partner and manages to get it off-course but it still hits his book. Kiyo, who was sad seeing Yopopo's book on fire, manages to use Bao Zakeruga to destroy his armor. Yopopo then uses Doremikeru to finish him off and sends him back to the mamodo world while his powerless and defenseless partner runs away.
In the end of the battle, Kikuropu is seen in a picture with all mamodo pictured by Zatch given to Kiyo. His partner is also shown to have received a letter from him and had some tears in his eyes reading it.