Nope. I'm not kidding. I think that Reyna is the daughter of Thanatos, Death. (Bother this if you read my Chaotic Sea post...you'll still get free props and the next preview. But you gotta be the first person.)
Evidence. Fine, here we go!
Rick Riordan's Blog
Is Reyna powerful?
Is it a god that we have seen in the Percy Jackson/Heroes series?
I mean, come on, guys. Reyna said that she looked as if Percy had walked from her worst nightmares. Why does this matter? Read the next piece of evidence.
Summary From Very Accurate Library
Demigod Percy Jackson, still with no memory, and his new friends from Camp Jupiter, Hazel and Frank, go on a quest to free Death, but their bigger task is to unite the Greek and Roman camps so that the Prophecy of Seven can be fulfilled.
Do you understand what I mean? I personally believe that Reyna's dad is Thanatos, or whatever his Roman name is. What do you think? Comment.