Rook often looks out for Epel. Epel considers Rook to be a "weirdo," but still tries to protect him from Vil.

0:00 - Rook and Epel meet for the first time
0:39 - Rook between Epel and Vil
0:55 - Epel and Rook in Book 6
2:08 - Epel calling Rook's unique magic "scary" removed from EN
2:39 - Epel defending Rook
4:26 - Rook and Epel's unique magic