Mizukami, Sou

Kiyo's childhood friend who trains in the mountains. He came down from his training to meet Kiyo once again- this time to protect her. This is because in the past, he was a cowardly boy- always having Kiyo repel evil spirits (exorcism). He then admired her strength and vowed to be stronger in order to return the favor. His sword detects any evil aura- and sure enough, whenever Kuroboshi is around, his sword detects it. He proclaims himself Kiyo's bodyguard when he learns that Kuroboshi is a vampire. He fights Kuroboshi during the Romeo and Juliet play, and he still claims his position as bodyguard because he claims that Kuroboshi is weak.