Major spoiler here
Spoiler!
The reason reine keep hearing kion name is because on that night kion cast a spell that need a consent from their partner to be casted on that spell is like a 2 way tracker, when kion think of reine in reine mind she will keep thinking of kion and vice versa but when reine call kion name he can just move straight to her, this spell make her a bit annoyed because her daily life in her head is just kion kion, and many message he think of her
