Kei Nagai

Kei Nagai is an Ajin and the main protagonist of the series. Nagai Kei is a young man who spends most of his time by alone, studying or just keeping to himself quietly. He's voiced how much he dislikes physical activity as he "comes from a white collar background". He has short black hair as well as pale skin. He has thin black eyebrows. He's 5'5, slightly short for his age, and has a fairly normal body shape/proportions- though he puts on weight easily. In the anime, Nagai's eyes are a dark red colour. At the start of the manga, his eyes appeared black, before later becoming a piercing red. ...