Why is Sakurai-sensei always sweating like a sprinkler? I never really figured this out. Is Sakurai-sensei always super-uncomfortable around people? Or is she nervous? Usually sweat drops jumping off someone is a vfx for surprise, but I don't think this is the case.

 

What's up with those crazy sweat drop novas all the time?
No matter who Sakurai-sensei is talking to (other teachers, students, etc) she has those panic bubbles/sweat drops around her. 

I took this to mean she's just a naturally nervous person instead of being uncomfortable around people. I can't think of anything in the show that implied she was uncomfortable around others since she was always willing to help and talk.