Kazuma Nio is a member of the Japan U-20 team.

Kazuma Niou is a tall and lean individual with a confident and laid-back demeanor. He has medium-length black hair that is slicked back, revealing his forehead. His facial hair is distinctive, featuring a narrow goatee and a short mustache, adding to his sharp and mature look. Kazuma has dark, intense eyes with thin eyebrows that often give him a somewhat stern or serious expression.

(Source: Blue Lock Wiki)