Humans were originally created with four arms, four legs, and a head with two faces. Fearing their power, Zeus split them into two separate parts, condemning them to spend their lives in search of their other halves. This is the reason why Rowan delos Santos and Percy Jackson have been unknowingly tied their whole lives, and finally brought together on one random evening. percy jackson x fem!oc. sea of monsters - the last olympian. book 1 of 2. editing once completed.