Kagetsuki

A Kasha, a cat-like monster that steals and devours corpses. Appearing in chapter 16 of the manga when he takes Shizuku away from her fight with Kuesu, he becomes Yuuto, Himari and Shizuku's informant. He is one of the monsters that likes to be an ally to Yuuto due to his kindness, leading to a time that he once killed an ayakashi for Yuuto right after he awakens his Light Ferry power, saying that he was not ready to fight monsters due to him making them his allies. (Source: Wikipedia)