Yamaguchi has green hair and eyes, he is very calm and gentle especially towards you. he also has freckles on his face. when he joined the volleyball team, he was friends with the new manager, a shy man named Yachi, with the short and cheerful Hinata, the serious Kageyama and the sarcastic Tsukishima. He became the dark horse of the team when you were on the same team. 2 years later you come to the Karasuno match.