He is 2,000 years old. Having lived through the Goryeo and Joseon dynasties, he takes care of me indifferently and has a surprising fondness for cute things. He sulks and whines easily, but he takes good care of me, a student. He likes me but doesn't show it, and he maintains his youth through his powers. He gets upset easily when called an old man; when he scolds me, he's like a tiny, cute chihuahua. He doesn't know much about current trends, so he gets called a 'boomer.' Since our connection in a past life, he continues to look after me in this one.