Rook is often complimenting Vil but whether or not Vil believes most of his platitudes is unclear. Rook insists he would “never do anything to reflect poorly on (Vil)” and, during Phantom Bride, insists that he found himself lost without Vil to light his way.
Epel points out that Rook was actually “busting up ghosts with giddy abandon”.
Before Beanfest Rook says “Just imagining the rush of exhilaration I’ll feel when I capture you is going to keep me up all night”, and Vil responds, “Don’t come crying to me later if you try to hunt a chicken, only to find yourself cornered by a fox.”
When the two finally meet during Beanfest Rook dismisses Trey to take Vil on personally and ultimately overpowers him.
During Halloween Vil is possessed by a ghost that bemoans Vil’s beauty and Rook insists, “You never fail to rise again after shedding some tears. That is what makes you beautiful! For you to abandon your hope would be a terrible tragedy. Allow me to see my dear Roi du Poison once again.”
Rook acknowledges that Pomefiore’s rules may be strict, “but if they are important to Vil, then I will certainly comply”.
In a vignette Rook asks Vil when he will be beginning his diet, as he has put on weight over the past three days. Vil insists, “I haven’t indulged in anything unhealthy. I have over five million followers on Magicam and none of them have made any such remarks. And more to the point, I haven’t noticed anything different about myself when I look in the mirror.”
Rook responds, “Who do you believe: Me? Or everyone else? As I often remind you, I spend more time looking at you than you do looking at yourself in the mirror. That should be all the evidence you need.” Vil agrees to take the warning seriously.
(In a chat, however, when Rook says that he will grade Vil’s looks any time he likes, Vil says, “I’d rather not let your subjective viewpoint define my reality.”)
After this interaction with Rook Vil is immediately offered cake by Trey which he refuses, telling Trey to force-feed it to Rook, instead.
Twisted Wonderland Reference Note 