It really does seem like Fueda knows exactly what Kodama looks like and that he doesn't have any kind of delusions or powers outside of her imagination. Fueda's mental image of an ordinary girl in this chapter looks like a different angle of Kodama from his picture of her. The globe that was magically repaired in chapter 5, presumably as an example of Fueda's powers while Kodama describes them, is shown as just having been taped back together in chapter 7.