Airi's big brother...
Yes.{She's using it in the Japanese way to answer negative questions, which is "Yes, indeed, I'm not gonna sit." It would probably be a bit weird to sub it "No" though. That said, I can't think of a good way to rephrase the question either. "Are you just going to stand?" is not really optimal here. Maybe just leave this like this and write it off as her talking weirdly?}
Yes. In short, the military is short-handed.
Yes.
I heard that if get too close, with just a breath, you can lift my skirt.
Yes. I am Nokuto Leaflet, a first-year.
I see. And as a result of those efforts, you jumped into the girl's bath and groped people, right?
Lisesharte-sama is presently undefeated in this school.
Yes. As things are, Airi's big brother is sure to lose.