Katarina Ulrikasdotter van Wallenbach
Phantom Wiki URL
One of the love interests for the 4th Phantom but he had real bad luck with love and things never panned out for them. They met during the 30 year old war and when the 4th Phantom lost his Skull Ring. Katarina Ulrikasdotter van Wallenbach was the niece of Field Marshal Didrik Von Falkenburg, Commander of Magdeburg.
She is a gentle soul who really made the 4th Phantom smile and feel again after being depressed for so long with the death of his first wife.
They did met again but never married. The 4th did marry again according to another story and it could have been Katarina even though this story explicitly said they didn't marry.