Sakakura Izuru

An unsuccessful mystery writer who discovers that the protagonist has amnesia. He also works as an occult researcher. He is not satisfied with the fact that his name is well-known, as he has appeared on TV.

He's a weirdo who can't hide his shadiness, but as a mystery writer, his deductive powers are remarkable, and he has a wealth of knowledge.

He is also a skillful speaker who can convince people, and is relied upon as a guardian. However, he still acts suspicious.