Light is a young man, standing at above average height with light-brown hair and brown eyes. 

When not wearing his school uniform, which consists of a tan suit and red tie, he dresses fairly casually, sometimes sporting a dress shirt underneath a jacket or a V-neck sweater with a collared t-shirt underneath. 

He is considered to be quite handsome, a trait noted by Misa Amane. 

Light is a natural genius, charming, manipulative, self-centered, has a God complex. Always one step ahead.