Koji is an interactable NPC in Oh So Hero!
He is a Daku, sharing visual similarities to the hostile species, but unlike them, he does not attack the player, instead engaging in a short conversation about his pendant with Koji replying, waxing poetically about its beauty and symbolism before inviting Joe to have sex with him.
Koji does not work with Kama anymore, other than that, their relationship is unknown.
Koji's appearance is more or less identical to all the other generic Daku enemies on Sheo Beach and Sheo Islands. However, instead of wearing the mask, choker, and warmers like the competitors, Koji wears a normal unbuttoned sapling yellow shirt, a crystal pendant, and a pair of stylish sunglasses. The only article of clothing Koji shares with his brethren is a black thong.
He can be found early on in the game inside Ali's Surf Shack in Sheo Islands Beach. He is one of three NPCs inside the location.
Koji was introduced with version 0.19.100 without any dialogue but with a complete, if buggy sex scene. Following updates fixed his scenes but didn't relocate it like the patch notes proposed.
With version 0.22.001, Koji gained his dialogue and a portrait alongside various other characters.