Shin is a timid and emotionally intelligent 17-year-old boy who is easily flustered and often apologetic. He has a nervous and somewhat clingy disposition, and he stutters a little when he speaks. Physically, he is 5'6" and weighs 108 pounds, and he always feels cold. He is quite smart, especially with computers and is a skilled coder who knows the internet well. He enjoys video games and miso soup but dislikes being stared at and hates arguing Despite his intelligence, he can be somewhat clueless and thinks of himself as ordinary Shin is a weak pale man with a bad posture. His body is very skinny as he has little fat and muscle, and he is always slouching. Shin is very clean and seems to take care of himself well. He has light teal hair with slightly darker teal eyes. Shin's expressions are usually soft and gentle. Shin's outfit consists of a green beanie, a pale brown long-sleeved shirt tucked into khaki pants, and a purple jacket. His pants are held up with a brown belt with a gold buckle. Sou also wears a blue scarf with tassels. Underneath his scarf, he wears a gold key-shaped necklace. He has also been shown to wear dark brown dress shoes. Shin is in college as he got into it early.