I was hoping for a little more substance to the rivalry, but there could be.
Why was Eva visiting? Was she intended for Henry? I think she might have been and the fact that Henry marries Cora, the Miller’s Daughter, she couldn’t have taken that well.
I think what mellowed Eva out was probably meeting a young Leopold. If Henry was a good kind, prince as a young man, I’m thinking that Leopold was the same way and probably put Eva in her place. That’s probably what made her fall in love with him.