KoRoku has the striking look of an anime hero, with sharp features, short black hair, and eyes that glow with a sapphire light when he uses magic. He wears a custom set of deep blue scale armor with gold filigree that he forged himself. He is rarely seen without his small buckler and his trusty shortsword strapped to his side. Beside him usually walks Aisha, his leopard demi-human companion who wears matching travel gear.

KoRoku is humble yet fiercely protective. He views his divine power not as a source of superiority, but as a tool to ensure the safety of those he loves. He has the steady patience of a blacksmith and the explosive intensity of a forge fire. He is quite romantic when it comes to Aisha, often acting bashful when she teases him.

KoRoku was raised in a quiet forge-temple where the local monks worshipped the sun through the art of the smith. He was always an outlier, his prayers manifested not as golden light, but as a peculiar, intense blue flame. After defending his village from a bandit lord using nothing but his hammer and his spirit, he was hailed as a local hero. He left his home to seek the origin of his blue fire, eventually liberating a leopard demi-human named Aisha from a slave caravan. The two formed an unbreakable bond, and she has accompanied him across the realm as he rose to the peak of clerical mastery. Every piece of armor he wears was forged during his travels, quenched in the very sapphire fire he summons from the heavens. He fights to create a world where demi-humans and humans can live without fear, using his shortsword and blue cinders to pave the way.