Joka is the youngest of the Three Princesses of the Verdigris House and one of Maomao's "older sisters". 

Compared to the other two Princesses, Joka is much colder and more aloof to customers. Despite being a courtesan, she does not like men, whom she sees as untrustworthy. She is, however, generally gentler with her fellow courtesans. Her words are often elegant but harsh, to the point the letters she writes while being angry must be checked before being delivered to her customers.