“katara is uptight and gets offended when anyone swears in her vicinity” has gotta be one of the lamest fandom jokes. for what it’s worth, i don’t think any of the atla kids wouldn’t swear out of some naive sense of propriety (with perhaps the exception of azula, because she’s an obedient goody two shoes who thinks coarse speech is for the lower classes), but katara would be one to swear a lot. she definitely swears more than sokka, although she’d also regulate her speech better so as not to offend those around her (especially if she is in the process of sucking up to an adult). sokka would swear just because he’s a grumpy, easily frustrated person whose choice of words reflects his frustration, but katara would swear out of her fundamental sense of rebellion. a deep thrill runs through her every time she says fuck or shit, because she is fourteen and away from the admonishing tongue of gran gran for the first time in her life. katara, toph, and aang are still young enough that saying “bad words” fills them with a sense of excitement over “breaking the rules,” whereas for sokka, zuko, and suki, that novelty wore off a while ago and it’s simply a part of their everyday speech. but while sokka is a teacher’s pet at heart who presents as a misanthropic asshole, katara is a mischievous ne’er-do-well at heart who presents as a beacon of polite decorum whenever she wants to get her way (typical elder vs younger sibling distinction). but you know that when katara is yelling at sokka, pakku, toph, zuko, and every other unfortunate soul who may find themselves on the receiving end of her wrath, she’s cramming in as many “what the fuck is your problem?!”s and “get your shit together!!”s as she possibly can. then again, katara would definitely respond with righteous indignation if toph cursed in front of her, but that’s hardly because katara is offended at toph for saying bad words. rather, it’s simply because she also happens to be. a massive hypocrite.