[Of course, it's been impossible not to notice a new addition to the Holy Trinity-turned-Two....ity-turned-back-to-Trinity. Or something. The Three Musketeers!!
.... except Stiles definitely wasn't expecting the third one to be so, you know. Sullen. Moody. Alcoholic. (Though book withstanding, maybe this shouldn't be a surprise.)
In any case, he's wandering over to Athos, peering at him with a concentrated expression.]
So.... is your face, like, permanently frozen like that? [Into a frown, that is.]