Kai is described as having the beauty of a woman. He has a slender build, shoulder-length black silky hair parted down the middle, thick eyebrows, and empty dark eyes. Despite appearing thin, Kai has a strong body underneath his clothes. Kai often has a blank, inexpressive face. He wears a red apron with a yellow pattern given to him by the Chidouin family over a long-sleeved black changshan with orange trimming, brown pants, and red slippers. Kai usually holds various kitchen utensils, specifically a ladle, spatula, and frying pan.

Kai is a stiff and awkward person who doesn't know how to communicate with others but has good intentions. Kai has significant affection for Sara and her family and is inspired to protect the innocents. He is the housemaker of Chidouin's residence, sustaining their daily life and ensuring they're safe. Kai loves cooking, doing chores, and watching afternoon suspense dramas. However, he has a dark past he wishes to leave behind.

(He is one of the Death Game participants.)