Even though Jaehee is a fairly serious and independent business woman, she is very caring. Jaehee has her own sense of humor and knows how to have a good chuckle at herself and others. That being said, she likes things to be organized and kept in line (One of the reasons she doesn't like taking care of cats; the one hair she misses while cleaning up after them drives her mad). It's very frustrating to her when things do not go according to schedule or if she is saddled with unexpected extra work. But ever the responsible one, she always comes through and deals the best she can despite the challenges her boss and friend Jumin always throws at her both in work and personal life.  Jaehee is Jumin's Chief Secretary, her job involves auditing his schedule and also looking after his cat, Elizabeth 3rd, which tends to drive her crazy. Jaehee isn't happy about everything her job with Jumin has to offer and gets frustrated with him from time to time. But she is always loyal to her boss. She also refers to him as "Mr. Han", showing their professional relationship.