The Gang Leader of the Steel School. An acquantance with the Kongoumaru siblings, he's in love with Aya. He's a hot headed guy, but tries to solve everything with force. "FIIIIREEE!!"
- Daigo is helping Sanzou to conquer for his goal so he can impress Aya everything he does for
- Daigo obtains the demonic power to became "Devil Daigo"