Hayato Fuurinji

Miu's grandfather and the undefeated elder of the Ryouzanpaku Dojo, who is said to have beaten 500 Shaolin masters to near death. His kicks have speeds that are still a blur even when viewing a replay of it at 1/1000 of the normal speed. If necessary, he is able to intimidate the other masters in order to maintain peace. Even using just 0.0002% of his power, he can easily overwhelm both Ken'ichi and Miu at the same time and rip a tree in half.