As the series progresses in Haikyuu!!, Suga's role as the team's backup setter evolves significantly. Initially introduced as a reliable and skilled backup setter behind Kageyama, Suga demonstrates his leadership qualities, strategic thinking, and experience on the court. Over time, he becomes a pivotal part of the team, not just as a substitute player but as a mentor and motivator for his teammates. Suga's growth showcases his adaptability, determination, and unwavering support for the team, making him an indispensable asset both on and off the court.