This character is an exorcist.

In some religions, an exorcist is a person who is believed to be able to cast out the devil or other demons. A priest, a nun, a monk, a healer, a shaman or other specially prepared or instructed person can be an exorcist. An exorcist is a person who performs the ridding of demons or other supernatural beings who are alleged to have possessed a person, or (sometimes) a building or even an object.