Immediately on the heels of Arya's tense face-off with the Hound comes her charming reunion with Gendry, who she last saw being hauled off to the Red Keep by Melisandre midway through season three. Arya initially maintains the blank-eyed deadpan she used on The Hound, while Gendry fidgets like a gawky teenager for a bit, paying her an awkward compliment ("You look . . . good") before giving up on the small talk and returning return to work.
However, apparently all that was needed to crack Arya's frosty facade was a crooked smile and a well-placed "m'lady," which Gendry delivers with some serious smoulder. It's enough to get Arya to drop the Faceless Man act, just for a moment, as she reverts back to the teenage girl she was in season three, with a crush on a cute boy.
Then Arya collects herself and asks Gendry to make her a weapon, and it's back to business as usual. But for a few, glorious seconds, we got to see the two of them standing there grinning at each other like anxious prom dates, and it was adorable.