Yukino Tayasu is a 28-year-old training assistant working at the horse racing training center. He collaborates with colleagues Akari Sumeragi and Futoshi Kashino at this facility. His role involves hands-on support guiding aspiring jockeys through their practical training phase. Visually, he is distinguished by his green hair. Tayasu appears during the "Training Center" story arc, where his position contributes to the educational environment as the main characters transition beyond the initial academy setting.