User blog comment:Frodo the 9 fingered/A Third Camp?/@comment-3146930-20120726210504/@comment-3146930-20120807033554

I know the gods don't have DNA, but their parentage does seem to have some role in their feelings for each other. For example, Percy gets a strong feeling he shouldn't be at Camp Jupiter when he arroves, as well as the ghosts that insult him and seem to "know" he is a Greek demigod. Annabeth also doesn't really like Jason, still thinking that he is leading them into a trap, but this could be because of Khione. However, the snow goddess said herself she can influence a being more if the idea is already in their head. While Octavian may be the most vocal about hating Greeks, the Romans don't appear to train their cohorts to hate Greeks and they are just naturally untrusting. Chiron even said that everytime they meet, they end up trying to kill each other