Han Du'er is a young woman who is infatuated with Tan Mobai. She appears delicate and often uses tears to gain sympathy. She calls Tan Mobai when she is drunk and in trouble at Huangyu. She clings to him and asks him to break off his engagement with Yi Qianqian. She pretends to be weak but may have a cunning side. She stays at Tan Mobai's villa for a night and tries to interrupt the couple. She is jealous of Yi Qianqian and acts innocent. Her presence causes conflict between the engaged couple. She represents a threat to the engagement. Her actions are driven by her desire to be with Tan Mobai.