Darl took a moment to wonder where the conversation had gotten sidetracked like that, and he blinked in confusion before he turned his head to follow Ace's and noticed the men. He frowned, but only slightly, before he turned his head back to Ace.
Now that it had been pointed out, it did seem like there was more than just 'oh hey, I recognized a friend in Hogsmade' going on. But he wasn't going to make a big show about asking.
Neville was concerned, mostly because of Ace's reaction, but he wasn't certain it was any of his business. He looked at her with brief concern, not wanting to press but wanting her to know that he wished to be there as a friend, if she needed it.
He supposed though, that if she wanted a friend, she would go to Ari. Perhaps this was an issue that she needed a female friend for.
Darl chuckled to Ari's assessment. "Do you give lessons?" he teased Ace briefly before turning his attention back to Ari. "I'm not convinced that I have the 'mean look' down yet. Think I sympathize with the wrong-doers too much. Doubt I'm very threatening."