Gavv OC I made. Tsurai's city is an experimental playgroundd for the Stomach Company where people have been going missing. His belt is an experimented-on Granute turned into a wannabe weapon to fight against the 'granute hunters', but was tossed in the trash because he could barely taste anything and thus couldn't make Gochizo. But the MC Tsurai is conveniently a lover of extreme spice and foods, allowing him to grant Scovii, the belt, new tastes. He devotes himself to Tsurai as the man who saved him from flavorless ennui.
Dee-Kay, the umbrella-spear, is a second experiment that would show up later as another experrimental weapon, but he is unable to taste because his mouth decays everything that goes into it. Extreme flavor Gochizos give him a burst of flavor, however, and lets him create Decay Agents to fight alongside Candaemon.
