Unless I'm overlooking something, there doesn't appear to be any guidance offered to the DM regarding how such a character would become the party's ally against Strahd. Sure, as a DM, I could come with something, but I'd prefer to know about any possible guidance from the adventure, because currently I'm at a loss with how I would be able to narratively make sense of this.

Unless I'm overlooking something, there doesn't appear to be any guidance offered to the DM regarding how such a character would become the party's ally against Strahd. Sure, as a DM, I could come up with something, but I'd prefer to know about any possible guidance from the adventure, because currently I'm at a loss with how I would be able to narratively make sense of this.