獅子原・シン・要

A man who is said to be the strongest Youma at the moment. He is a lion-class Youma who can transform from human to Youma and back, known as "Kakusei-mono".

A quarter-Indian, effeminate person. He is Rin's target of revenge, and since Rin always throws a wrench in his plans at every opportunity she gets, he also aims to take her life.