Prussia/Austria is a common pairing in Hetalia: Axis Powers, involving the characters of Austria and Prussia. The pairing is sometimes referred to as the Water and Oil Pair, based on how water and oil don't mix, much like how these two characters cannot get along. A more common name for the pairing is PruAus, a combination of the first three letters of both of their country names.

In the Hetalia ★ Collezione, which came out in November of 2021, Austria has been explicitly confirmed to be Prussi