Hiruko

Hiruko is the nightmare inspector. He is a Baku which feeds on dreams. He will help you with a nightmare, then in exchange for the help he can eat the dream. He was known as Chitose Kurosu before he became "Hiruko" after Azusa, Mizuki's brother. During volume 2 it showed part of Hiruko's past, which is how he came to the Silver Star Tea House.