I'm talking about a situation where you have narration, dialogue, thoughts, and e.g. a second character inside one character, like if the character was possessed by a demon that now and then spoke to the character inside his head. How would you format the demon's speech? Cursives? Cursives between quotation marks? CAPS (like Pratchett does with Death in Soul Music)? A separate paragraph in bold or a different font (like in Hopkinsons' 'The Salt Roads')? I've tried doing it like I do thoughts and like I do dialogue, but both are confusing because the first makes it look like the character's thoughts, the second like one of the two or several people partaking in the conversation said it outloud instead of the demon speaking inside one character's head. I haven't yet tried caps or separate paragraphs/bolded/different font because I'm worried it would be an MS formatting no-no that would have all agents, publishers, and fellow authors chasing me with torches and pitchforks.