Mordecai

Mordecai was Esther's cousin,and also a palace guard for the king.He saved the kings life by warning Esther of a plot he had overheard to assassinate the king.While he did not recieve credit immediately for this,he eventually got his reward when the king ordered Mordecai's enemy Haman to walk him through the streets on the kings horse shouting praises for Mordecai.While Haman had enacted a devious plan to exterminate the Jews,Mordecai again warned his cousin Esther and she again was able to help them by showing the treachery which Haman had concieved.In the end,Haman is hanged and Mordecai is given Haman's job.