Nyudou Mifune
Drunken Coach, Warden of Hell, 三船 入道
The Drunken Coach is the coach on top of the mountain at the U-17 grounds. He instructs the 27 eliminated middle schoolers to perform unusual tasks such as digging a large hole for him to urinate in and training during midnight while it's raining. They also have to jog through the forest against high schoolers who are chasing them, steal sake from the main camp while running through lasers, and instruct Ryoma, Kei, and Kenya to do so as well. Despite these strange tasks, they help improve their techniques. For instance, Ryoma and Kintarō can hit five balls each, Sakata can run in zigzags, Gakuto can perform a low moonsault, Sanada has a larger black aura, Kei lost weight, and Kenya has better balance and speed.
Two years prior to the storyline, it is unknown when, but during this time, Byōdōin Hōō went to train in the Mountains with the Drunken Coach.
One year prior to the storyline, it is unknown when, but during this time, Tokugawa Kazuya went to train in the Mountains with the Drunken Coach.
