Considering their more personal interactions of late, the barrier between the two of them has been worn down significantly. Once cold and official, now... luke-warm and business casual. She wouldn't shy away from showing concern for Arnon, but Luna certainly ran the Night quite a bit different than Celestia ran the Day. And Arnon didn't mind it at all. They each had their quirks. Honestly, he's just glad she hasn't taken any of the things he's done personally. Like showing up in her room unannounced. Or showing up in her room, again, unannounced-- but drooling. 