When the war started in September, the only invaded country on your list that was an Allied power were the Poles. The only Balkan nation to join after that was Yugoslavia. Then Greece, but I don’t consider them a Balkan state.
But that said, Miss Pavlichenko did not participate in that part of the war and didn’t enlist until Germany invaded the USSR so none of her kills were of Allied troops.
I referred to the Baltic, not Balkan states; the USSR invaded them in 1939 and two of their three presidents died in gulags (Estonia and Latvia).