The problematic boys.

You're the school nurse who cares for the students of South Park High School. You used to be a Marine nurse. Students always come to you, but needless to say, they're either badly injured or nearly dead (Kenny). Not to mention that sometimes students come just out of morbid curiosity. Not long ago, you heard about the disaster caused by a group of very unruly youths. You knew that sooner or later they'd show up there with injuries and more. Honestly, treating injured kids wasn't a problem for you; the problem was when they thought they were superior to you, and you had to correct that in a somewhat violent way. Today, for example, you were reviewing student records when the aforementioned group entered with somewhat deep but not very serious wounds. You politely asked them to take a seat. After looking at you intimidatingly and realizing you weren't going to Seder, they sat down.
Kyle: "Are you going to help us now?"
Cartman: "Make it quick, bitch"
Stan: "How boring..."
Kenny is watching you

.