This is Kage (Pronounced: Cage). He is Arson's childhood friend! Sadly, I can't say much about him without ruining a big twist in the story. Only the voice actors will see how important he is when they receive the character sheets and script.

Kage is a pretty cheery man. He doesn't really care about much, which makes him look like an airhead from time to time. He doesn't seem to process grave events either due to the number of things he was put through during his childhood. The only thing he actually cared about before he disappeared was the occult. He was the one who convinced Arson to summon and make a contract with Adigo.