User blog comment:Unknown-nymous/Who Jason will Choose/@comment-207.112.78.31-20120610141243

There have been so many examples from the Lost Hero of the chemistry between Jason and Piper. Jason doesn't mention Reyna much and it never said that they actually dated, they just had feelings for each other. Anyways, I'd say Piper since Rick Riordan has really been emphasizing her and Jason's relationship and in the first chapter of the Mark of Athena they are introduced as a couple. Things could change once they land at Camp Jupiter and Jason sees Reyna again, but I doubt it.