Inkyun is Sakkyun's older brother, and an incubus. Inkyun is said to bear a striking physical resemblance to the king of humans, Suya's father; however, unlike him, Inkyun is lazy and prone to wandering around instead of doing what he's supposed to. When Suya spots Inkyun in the hallways during one of his visits, she suddenly switches to intense work mode, feeling guilty that her "father" is supposedly putting in more work while she's resting.