Any tips for getting rid of a ghost?

Symptoms include: erratic behavior, hearing voices, seeing things. Eye witness account of possession (victim spoke in an unknown language, voice changed, face looked “demonic”, temperature drop and wind during the event, no smells) victim reports that the entity is harassing them and possibly trying to harm them. Also could this be a demon? I don’t think it is very likely but I would like a second opinion.

vine

Pokemon is satanic