In the book "The Lightning Thief", the main protagonist, Percy Jackson, is portrayed to be a young boy, no older than 12, who is tagged as a strong, independent and above all, brave. In my opinion, in The Lightning Thief, he is static. Throughout the whole book, Percy has been pretty consistent with his personality. At the very beginning of the story Percy stood up for what he truly believed and sometimes got himself in sticky situations and the majority of them got him into trouble. Even though, towards the middle to ending of the book, the trouble is much more risky, it’s still the same idea. I believe that Percy is a fairly round character. The author didn't give direct details, but a lot of his traits are retrieved from actions or quirks. Usually just little things he does throughout the story. In general he is a great character and one of my favourites.
In this novel the displayed antagonist is Ares, one of twelve Olympians and the god of war. Ares is described as an irrational, intimidating and dynamic character. When he first comes into the story, Ares acts like he towers over people, or thinks he has control over everything. However towards the end, I believe that he started to realize, that he didn't. Like I mentioned, Ares comes across as very powerful, but, it is suspected that there may be an even greater force to be dealt with. I guarantee towards the end you'll be shocked to discover the true antagonist and realize his power. Read the book to uncover the real mastermind. In general he is a flat character. Most of his traits that I pulled out of the book were from his actions.