For a short moment there he can laugh and forget the pressuring problems at hand. In times of great stress, Adhara's presence is always able to make him calm down just from being there, Rex doesn't know when he develops this kind of chemistry with her.
Maybe because she's the one that accompanied him from the start, he doesn't know.
Rex feels refreshed from teasing Adhara about the attack from the cursed creatures, and now they both are cuddling on the bed. With most of the things he can do now has been covered, he doesn't need to go anywhere except for training.
With his control over his mind being very high, Rex can meditate in any position he wants.
Even while he was lying down with Adhara snuggling on his arm, he was still meditating with his eyes closed. Adhara clearly needs some comfort, and by doing this he's basically killing two birds with one stone.
Hours passed, and his meditation was disturbed when someone knocks on the door.