Board Thread:General Discussion/@comment-25014849-20140627232456/@comment-3146930-20140718213958

There is also things like motivation that factor into how strong a character is. Percy is extremely loyal to his friends as stated many times in the series. As a result, in battle he is more willing to push himself to his limits if it means protecting those he cares about. In a way, that is what makes him the most powerful, his willingness to go beyond what his limits are if it means protecting people.

Jason is obviously protective of his friends, as is everyone else; however Jason never seems to push himself the same way as Percy or even Leo does. He doubts himself too much and as a result, when compared to the others he just doesn't seem as powerful. Not to mention his main attack is calling down lightning, but this seems to tire him out very quickly. Leo on the other hand managed to cause a goddess to retreat and Frank doesn't seem to get tired from transforming (plus he can heal when he transforms if I remember correctly, so another benefit).