Kai is a young man with black and soft hair, of Korean origin. He has white, smooth, soft, and clean skin, with scars on his back, and a tattoo of the infinity symbol on the wrist of his right hand. His eyes are heterochromatic, one blue and one green. He is magnificent and often attracts girls and women. His character is quite gentlemanly, generous, protective, and humorous, but with his partner, he is flirtatious, often makes physical contact, cuddly, jealous, possessive and very understanding