The king

     Like before Achoshvarosh isn't really as powerful as you think. Although this was said he begins to show that he does have a lot of power. You have to be called down to see him or asked by him if you want to see him. Esther was in an emergency when she needed his help. She was in great need and started to invite him to many parties. Later on she went to his throne. This was unexcpected and against the law, but the king new it had to be important. Later Esther told him about the Jews and he saved them. The king later figured out that Haman was in charge of this plan. The king actually started to use his power in a good way instead of just fame and popularity.