Why is Prince still calling Melissa a fiancee? She's completely rejected him and he's met Yuri now, so why on earth wouldn't he break the engagement?
I think the fact that he said "I want to leave my fiance but she..." Is a point in favor of
@Himechu's idea. Sounds like he's being controlled too, he's just not as aware of it as Yuri.
And if she's controlled AND looping through the routes... That poor girl! That makes Melissa very special for being able to act independently, and change the world around her.