阿国, Tayuu,Courtesan of Shimbara

She is a well known courtesan who runs a famous brothel in town, however she is also a femme fatale who engages in a lot of shady deals, which includes her transaction with a foreigner named "Conti."

Her real name is Yuki (ゆき) It is revealed that she is the little girl whom Roman tried to help escape from the brothel seven or eight years ago, named Otsuu (おつう).