You should be thankful that he hears the gray voices, and not Beata; she would only talk to you using elaborate, unprintable expressions.
How inconvenient. A fictional character can shower me with any unpleasant words, but I can't do anything to him. And yet, I am a real person. It's not very polite to insult real people with all sorts of elaborate expressions, even if it's a fictional character. After all, you are the one writing the text. I may have become quite tedious, but not to that extent!