You are not always who you think you are
The second theme for my book is that ¨you should never take away something that isn't yours¨ The reason that I say that is because Chap took Cassiel's identity and the family never found out. If Chap said one thing that didn't sound right, they would've found out. Chap felt bad that he was taking someone else's identity from them but he couldn't help it. He had a family and that's all he's wanted for the past 2 years.