a) Luna liking Mamoru and being Claws McFangface over Tux is, I think, closer to Luna approving of people who disapprove of Usagi and disapproving of people who enable her, which is a really weird dynamic.
b) Usagi’s irritation here, though it stems completely and directly from jealousy, and the specifics she goes into, even though they seem to be completely made of dramatic irony, are probably why people go D: BUT HE’S OLD– when it was only JUST THIS EPISODE that she found out – with truly epic amounts of disbelief – that he was a college student. Lo:
Now, compare this really quickly with what’s probably the manga scene that informed this revelation:
…wherein she mistook him for a MIDDLE SCHOOLER. yes, that’s right, ladies and gentlemen, she thought he was fourteen or maybe at the most fifteen. Mistaking him for an adult was not in the cards. (Yes this is quite possibly my favorite early Usamamo scene because lmao trollmoru)
usagi own your jealousy