The role of ANNA in the musical 'The King and I' is a four-letter word. ANNA is a British schoolteacher who is hired by the King of Siam to teach his many wives and children. She is a strong-willed woman who stands up for her beliefs and is determined to make a difference in the lives of those around her. She eventually falls in love with the King, and the two of them learn to respect each other's differences.