Мидзуки Асами

Aoba Tsukishima's cousin and her contemporary. His father, Isamu Asami, is a world-renowned rock climber and the brother of the Tsukishima sisters' mother. Having traveled extensively with his father, Mizuki spent most of his childhood abroad and learned mountaineering. He returns to Japan to attend middle school, live with the sisters, and be closer to Aoba. He is popular among girls, but only shows interest in Aoba. Mizuki initially sees Ko Kitamura as a rival and constantly mentions that he is unable to pitch at 100 miles per hour. He occasionally uses his mountaineering skills, climbing school buildings without any equipment. Later, he also starts competing with Yuheji Azuma. He is a member of the school's mountaineering club, which he uses as a cover for his activities.