Miyuki enjoys getting into people's heads. Whether it being by outsmarting them on the diamond, or just by getting under their skin, he is often seen laughing because of this. In contrast to his his gadfly-ish attitude, he can be serious and forthright, not mincing words when pointing out what his teammates should have done and can do better. He can also be surprisingly strict and is told he has a nasty personality.
Despite all this, Miyuki is still well-liked by his teammates due to his reliability and cool head, making him a valued player on Seidou's roster. He comes off as callous at times, opting to progress forward, often ignoring personal sentiments and feelings, but in reality he wants what's best for the team, and for his team to be the best. Miyuki is among the players who takes baseball seriously and takes initiative in every situation that will benefit the team. His unorthodox methods has given him an edge over other players, and his talent is frequently recognized.
After Chris' early retirement due to his shoulder injury, he became a first string member on his first year and had been the primary catcher by his second year.
Miyuki is perceived as very sociable and friendly. He does not open up to people or talk about his past with other people. In all actuality he is pretty closed off with himself. He is one of the few players whose room is often flocked to by other members. He is Yuki's shogi playmate and Isashiki's former massager. Kuramochi and other batchmates also frequently hang-out in his room along with freshmen teammates Sawamura and Furuya. He looks up to Chris Yuu Takigawa, his senior who had defeated him in middle school.[1]
After the 3rd years retire, Miyuki is promoted to team captain, as recommended by the former captain, Yuki Tetsuya. At first he worries about not being able to measure up, but is slowly growing more confident in his role.