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. In fact, in his own way, his general cadence will give off that of a child's. He also enjoys teasing Zen about his cat allergy in the chat room. He is often surrounded by rumors concerning his sexuality because of his complete lack of interest in women, 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 Kang 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.