User blog comment:Unknown-nymous/Who Jason will Choose/@comment-4509745-20120428165218/@comment-3146930-20130113153350

I think that Reyna started to like Percy after he returned, saved the camp, and brought her sister. Before that, when she tried to get him to become praetor, her actions were most likely caused by the fact that she needed someone strong, someone others would follow, and someone who was the complete opposite of Octavian. She flat out says at one point that she would rather have a warrior at her side. Once Percy mentions that Jason is coming back at the end of SoN, her attention goes back to Jason. While Reyna did make a pass at Percy, Reyna clearly likes Jason more. At least that is my opinion.