That sounds wonderful! I like that the story plays on "agent" in so many different ways. Unreliable narration and slow reveals that characters might be more than readers thought they were are always fun, and it's always delightful (from the reader's end—it can be complicated to handle from the author's end!) to come at interesting characters from outsider POVs and control reader understanding. It sounds like you've set up a good challenge for yourself. Good luck with Prep!