Ok so I'm writing a kind of romance story where a guy falls in love with a ghost who haunts his apartment. The two of them only able to communicate through the use of a Oujia board. As the story goes on the ghost becomes more...real I guess. They become able to move objects and suff and I kind of want to imply they are slightly malisous but I kind of want to avoid the whole pushing friend down the stairs thing. Any help?