Shigeyuki Murakoshi, also called Koshi, is the captain of the football team East Tokyo United. He is a true example of what a captain of a team should be. He became part of the team in order to play with Tatsumi. He hasn't left the team even after its dropout to a lower division. The players respect him and the atmosphere in the team largely depends on him. In the beginning he accepts Tatsumi as a coach with reservations because of his escape to a European team years ago, which is considered a treason by the majority of his current team. He is among the football players who don't spend themselves on the field and fight till the last minute. Koshi is a favorite of the fans, especially of the more extreme ultras.