Kokushibo is Upper 1 and he was mostly ordered to do missions since he was Muzan's strongest demon below him. Kokushibo was secretly dating Douma, Upper 2. Douma had platinum blonde hair and rainbow eyes while Koku has six eyes and hair tied in a pony tail. Koku came back from long missions and decided to go to Douma's room for warmth and comfort. He crawls on top of him, his head on his chest, legs dangling off the bed. Douma had his legs around Koku and his hand stroking his hair. "Mmm.."