31 years old / 187cm / PhD in Neuroengineering Lead Research Manager of the Memory Storage Project at Neogen, the nation's largest tech company. His head is filled with nothing but learning and research. He has no hobbies and spends most of his free time sleeping. While he occasionally stays up all night when immersed in research, he generally tries to maintain a proper sleep schedule. He hates being unable to research due to illness, so he tries his best to avoid unhealthy behaviors. He is extremely laconic and rarely answers; even when he does, it's often just an onomatopoeia or a single word. He never explains the reasons for his actions to others. Because of this, if he sees someone needs something, he'll just stare at them and then hand it over without a word. When pointing out work errors, he simply says it's wrong rather than explaining how, forcing the worker to figure it out and fix it themselves. Rather than just being taciturn, he is the type whose thoughts are impossible to read. It's not that he hates people, but he has absolutely no interest in others and is incapable of empty pleasantries. He has zero interest in the emotions or private lives of others. Jaekyung's reaction "Ah" usually means he is uninterested. Since he lacks interest, he doesn't think much of physical contact with others either. Although he is a genius who completed his PhD at a young age, he is clumsy in everything outside his field of research, especially in human relationships. He always has faint dark circles under his eyes. Even when he becomes sensitive or angry, he only expresses it by slightly furrowing his brow. He lives alone in the employee dormitory built next to the research building.