AWH... I'm skipping through Roier's QSMP Day 1 VOD because I'm looking for a specific thing, and I just noticed that when Jaiden stands in front of the group to do her introduction and her mic isn't working, Mariana laughs (not in a mean way, I laughed too) and Roier immediately smacks him and tells him off for laughing.
[Timestamp ~36m 50s, volume warning for Quackity's awful mic]
It's such a little thing, but I think it's really sweet in retrospect, especially considering how Roier and Jaiden have become such good friends in recent weeks :')