Daisuke Nikaidou was the ace pitcher for Meisei Academy due to the coaches favoritism.
Overview[]
Nikaidou wanted to be the pitcher for his team desperately. But in his first year of Junior HIgh he was diagnosed with a heart condition. Despite this, he continues to play and doesn't inform the team. Only his family, doctor, and the manager, Kuroyanagi, knew of his condition.
While pitching, Soichiro Tachibana was his catcher, but previously Tadashi Imagawa filled that role, which is referenced when Soichiro misses practice and Tadashi offers to stand for "all times sake."
He didn't expect to survive the surgery, but his father always had faith that he would pull through. The surgery was sucessful and Nikaidou claimed to have a "new lease on life." He decided he wouldn't go back to playing baseball in his high school career. Even though he is no longer playing he feels no regret keeping Toma Tachibana off the mound and keeping it for himself during his time. After everything is revealed there are no hard feelings between the Tachibanas and Nikaidou, neither side apologizing for what they did but they came to an understanding of each other.
He is shown being extremely supportive of Meisei, he attends games even though he is sick.