Whose voice does your monkey channel?
Remember Linda Blair in The Exorcist? The devil in her spoke to the priest in his mother's voice, freaking him the hell out. Who is your demon quoting? Maybe it was the first art teacher who said something casual and cruel: "Remember, most people don't have talent. I'm sure you're good at something." Was it your mother who you overheard telling your dad, "He wants me to pay for that painting class.