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 client�le 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.

(Source: Wikipedia)