I am dumping our ideas about him here so we don’t lose them. We can scrap this post later.
CallyAnn:
My vague idea of how he’d fit into the Loose Canon plot is that he is/was once a narrator like the Merchant of Lost Things that traveled the canons in the guise/role of a bard. Like the merchant, his job was to appear to people and give them guidance. For whatever reason (something painful, dark, and/or insidious) he decided he didn’t want to “tell the stories” anymore and was instead interested in creating his own. He used/uses the power of his canon-bending music to lead characters astray and even right out of their canons, leaving corruption in their wake. He may be just plain crazy/greedy, or he may be a usurping idealist that wants to build his own perfect world by taking the good things from the existing canons and destroying the worlds in the process. He can create corruption monsters that look like creepy rats made of paper and ink and other media substances that serve as his minions/cannon fodder, but he also has a circle of sentient followers, people or even children he’s “collected” from various canons. That will give us the potential to develop an Org XIII type of rogue gallery of demi-villains the lorewalkers have to deal with, each with their own stories, varying motives and allegiance to the Piper. It might be fun to explore a character or two that question the influence of the music over them.