User blog comment:Smoky000/Why Serana cannot be married/@comment-36.73.62.122-20130427130943/@comment-7170985-20130504011442

In a way,the Dragonborn could be considered older than she is considering the Dragon blood was granted to a mortal during the Mythic Era and Serana and her parents were technically turned during the early First Era sometime after Lamae was turned,so there's really no telling how old she really is or how old the Dragonborn (As far as their soul) is,but being that Miraak was the first and was driven solely by his lust for power,him,Serana,Harkon,and Valerica may have encountered each other after they became vampires which could explain why it was the "last" Dragonborn was the one that freed her in the fourth era and defeated Harkon. That could explain why Harkon would eventually develop a resentment for the Dragonborn considering the possibility that he and Miraak faced off at some point if he had found a way to walk tamriel temporarily in that time frame and he could have formed some kind of connection to Serana and Valerica,which could explain what they know and could have easily caused Harkon to despise him more and that bond could have easily been formed,if not heightened between the Dragonborn and Serana. (Thinking outside of the box with most of what I say here,make what you want of it. lol.)