Suho is a young boy with black hair and black eyes. When using his powers, his eyes glow blue.
Suho displays little interest in things that bore him and don't get his blood pumping, especially his education. He also likes to get physical against any bullies who are stupid enough to pick on him and has an intense desire to surpass his father, who always easily defeats him in their sparring matches.
As Jinwoo's son, Suho first manifested his powers when he was six months old, shocking his mother  and causing his classmates to shun him out of fear. As a result, his father was forced to seal his powers and wipe his memory until he could learn how to control them.
- Solo Leveling Novel: Chapter 264