You can be Austria. But I can't say it was a large player in this, but is an interactive history so not everything has to be as it went on in reality.

I will post the goals for Austria, Prussia and Russia later today or tomorrow ( I have exams in January so I have to be careful with my time but I can cope if I stay on schedule) but it'll probably be something like keep interior stable and help allies (= stop the republican ideas from spreading to far)

By republican ideas I mean the cry for more democracy.