If it was the one I originally put, it would be explicitly romantic love. The correct one is more like affection according to my dictionary? So not explicitly romantic just like the other person said.
娘は恋の真の意味を知る The girl will learn the true meaning of love. It's kind of a clunky phrase to me. And it's interesting he added such specificity to the Japanese. I'm pretty sure he could have had it just say the same thing as the English and it would have made sense.
When panels depicting the prophecy are destroyed in 4, they reappear elsewhere. When the first group of heroes managed to subvert the prophecy, perhaps there needed to be a second group to finish it.