Jumin is a quiet, serious and cautious man who prefers to act mature. Despite this, he is interested in young slang and loves to talk about cats, especially his own, Elizabeth 3rd. He also enjoys teasing Zen about his cat allergy in the chat room. He is often surrounded by rumors concerning his sexuality, leading the press and other members of the RFA to tease him for possibly being gay. He views situations objectively, and wants others to be like him. He is a workaholic, which is shown through how he works Jaehee to the bone and is often until night at the office. Jumin disregards others' opinions of him, so he lives his life how he thinks is right.Jumin does not care for relationships because he thinks it isn't worth it, preferring to focus on his work and cat instead. This gives him the impression to others of a cold man or even a robot. He also keeps his work relationships strictly professional, believing that his employees will do anything as long as they are paid to. As Jumin has a high status, he lives luxuriously, but he hates people that only like him for his money. Jumin has his own sense of humor which the most RFA members do not understand, and at most times, isn't very funny but he doesn't care. Despite of his cold and objective perspective, Jumin treasures the members of RFA so much that when needed, he would use his authority to help them without hesitation.