Can people change encough to become friends when they were enemies? Jemmy and Prince Brat did. Really seems impossible for a prince to become friends with the son of a rat-catcher Jemmy-from-the-streets is now plain old My-old-friend-Jemmy to the prince.
Jemmy, the whipping boy of Prince Horace is tired, tired, tired of getting whipped every day. Now you probably get why they called him Brince Brat. When they run away and get kidnapped, they are only enemies and just care about themselves. But as the story goes on, they are back safe at the castle together.