2nd Nagisa momotalk
She talks to sensei about how students these days are using abbreviated words like hooligans, this sort of behavior isnt proper for such a prestigious school. Students must talk in proper ways, not using internet speak IRL

Then a bunch of guards rush I the room telling Nagisa of various problems arising in the school she needs to handle

She loses her cool saying the next person to anger her she'll stuff stale macaroons down their throat
Then she tries making excuses to sensei that she's not a person that loses her cool like that