After that how about Percy Jackson as a son of Nike? With his heroic strenght etc he can be second Hercules or something or you can send him to the Roman camp but you need to give him good charisma for that I think so he can be their general or something
Hmmm havent read yet but already liking yours slightly more then carl the jumper less complicated and your companions are able to move an help out at times altho i will admit the story feels more tell then show meaning a summary of events anyways keep up good work i anticipate the other chapters