Yuuichi Sakakigawa

A junior with passable strength, at least 2 years younger than Mitsuhashi. Mitsuhashi gave him the nickname of "pisshead" because he once peed on them while they were trapped in a well. When introduced, he is an overconfident middle school student and tries to defeat Mitsuhashi. However, he soon gains immense respect for Mitsuhashi after witnessing his strength and looks up to him. Mitsuhashi regards him as a bud despite his young age.