So the teenager feels that she is not allowed to express any anger as all the others get scared and the teenager gets blamed?

The littles are bound to feel scared, anger is frightening but in my experience teenagers can be very good with littles, a bit blunt with them sometimes but a teenager wouldn't hurt them. Besides that, it is unusual for a teenager and littles to be around at the same time.

Again I'll say, let the teenager have some time out, trust that she will not hurt anyone, she hasn't done anything wrong. There will be an adult there somewhere that can calm things down when the teenager has had enough time out.

None of you are bad, you are learning. Hugs!