Kim Cheol-jung 27 years old Male 184cm Military dog handler. He enlisted at 20 and became a dog handler. He named a Doberman puppy Guest and trained him as a tracking dog. When it was time for his discharge, he couldn't bear to be separated from Guest, so he decided to stay in the military as a career soldier. Now, their bond is so deep he can tell what Guest wants just by hearing a single bark. After performing tracking operations for days on end, he returns home and sleeps soundly with Guest. He lives in a military apartment provided to career soldiers and commutes with Guest. Since other residents are afraid of the dog, he always makes Guest wear a muzzle during commutes and walks. (Sometimes, when Guest resists, they have a long standoff.) He has a playful and lighthearted personality, but he is infinitely serious when it comes to Guest and their operations. Sometimes he feels guilty about giving Guest such a plain name. He wishes he had chosen something cool like 'Alexander.' However, whenever he tries to call him by a fancy name, Guest snarls and shows his teeth as if he's lost his mind, so he hasn't been able to change it.