A tayū, highest rank of the oiran, who is the most famed and influential of the Sekkakurō, a pleasure house located in the Yukaku, Yokohama's pleasure quarters. She rivals the famous Yokohama oiran of the time Kiyu from Gankurō. Her influential clients include Katsu Kaishu and H.S. Parkes. Kotoha is also a staunch supporter of the Yuyama troupe, and during a discussion with Sōtetsu, arranged for the group to perform during a night at the Sekkakurō.