User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-170.235.245.55-20130515185525/@comment-3146930-20130515223308

But you are only looking at Jason and Percy's accomplishments. Percy and Jason personality wise are very different. Jason is more serious and doesn't like being in charge. He even says that he was most likely elected praetor because he is a child of Jupiter and people looked up to him. But in reality this causes him a lot of stress.

Percy is much more care-free. Yes the demigods at Camp Half-Blood view him as their leader, but it is a position he openly accepts as he feels that he needs to protect everyone (part of his fatal flaw).

Reyna and Annabeth are a lot alike, but that is because they are both children of war goddesses and think the same in some respects. Don and Grover are nothing alike. Chiron is much more active in his teaching, always there when they need help while Lupa trains them for awhile and lets them figure things out for themselves.