Karakuchi, Kouji

辛口コウジ

Kouji attends Rosewood Private School, which is referred to as Seidou Gakuen ("Bronze Institute") in the Japanese version. He hails from an exceptionally wealthy family and tends to be somewhat spoiled and prideful. As a highly skilled Medafighter, Kouji and his Medarot, Sumilidon, are famous for their undefeated streak in Robattles.
Kouji and Ikki are rivals, yet they manage to coexist primarily because of their shared affection for Karin. Kouji is certain that he is Karin's boyfriend and frequently trains with Sumilidon to master the Shadow Sword technique, which was taught to them by Space Medafighter X.
He suffers from a severe fear of insects, originating from a childhood incident where he collected a mantis egg sac and forgot about it, causing it to hatch and scare him. This phobia extends to Medarots such as Spidar, which he openly fears, although he does not appear to react in the same way to Metabee despite its insect-like appearance.
Together with Ikki and Space Medafighter X, Kouji represents Team Japan in the World Robattle Tournament.