Pairin also known as Pai Ling, is  the eldest of the Three Princesses of the Verdigris House and one of Maomao's "older sisters". 

Pairin is described as a rather observant and thoughtful woman, which goes well with her line of work. Like the other princesses, she became more miserly with age, resembling the Madam in that aspect. But unlike many courtesans, she sells her own body not just for money, but also for pleasure