Yuichi Niki

A school nerd who loves Akemi and jealously hates Nagumo. He is later used by Suikakujū as a vessel to destroy the Chōjin, with the aid of a demonic phallus which he promptly substitutes for his own. He meets his end at the hands of Nagumo, who tears out his organs.

In the manga, he is a junior high school student involved with gangs. He receives a demonic phallus from two demons and is later killed by Nagumo's blood.