Dear Greg,
Okay, look. I know. I've put you in a box, and it's pissing you off. You're a secondary character, left out of all the big action scenes. Yeah, I let you do some hero stuff at the end; but it's not much. I don't even let you get beat up. Not even once. Plus, you don't get the girl. You don't. I'm sorry. It's not even on the table.
So I'm asking you again: back off. You are an important structural element of the story, but you're not The Guy. He's the one who gets to solve the crime and be the hero. It's his story. That's just the way it is. I know that I know you better than I know him; but that just doesn't matter. THIS IS NOT YOUR BOOK. Keep your nose in your own scenes.
You get the sequel, I promise. But you may not thank me, because for a lot of it you act like kind of a jackass. Because you can be, you know. I'm just saying.
You know I love you, man. Sit tight, do your job, and I'll give you more room in the next book.
Cross me, though, and I'll leave you married to that horrible harpy, and you'll never see your sister again. I'll do it. I mean it. Behave yourself.
Love,
Liz