The answer is <em><u>dynamic</u></em><em><u>.</u></em>
Explanation:
A <em><u>dynamic</u></em> character is one who learns a lesson or changes as a person (either for better or for worse). Most main characters and major characters in stories are <em><u>dynamic</u></em>. <em><u>Dynamic</u></em> characters are the opposite of static characters; while <em><u>dynamic</u></em> characters change throughout a story, static characters stay the same.