Rook is the servant of Dream World. He is seen in almost every D.W. scene.
When Scissors wakes up in Dream World in the epilogue, Rook asks her where she has been, then says she's the princess and the King's been waiting for her, and she'll be late for the ball if she doesn't hurry.
When the eliminated contestants are being thawed, Rook sees Scissors vanish out of sight then says "Oh my word!"
Rook tells Scissors that he wants to show her something. It is then revealed to a surprise birthday party. Scissors calls Rook a dork, but then she says he's kinda cool. Rook then prompts Scissors to make a wish. She says she wants to end Brawl of the Objects, which then sends Rook into insanity, apparently due to some unpleasant memories from a previous season he was on.
Your Highness, where have you been?
The King's Been Waiting for you!
Your The Princess, Silly and you will be late for the ball if you don't hurry!
- It is highly implied that Rook cheated in a eariler season, based on how he talks about a "shortcut" and "won" after jumping out the castle window when triggered in Rookie Mistakes.