Flat and Static
A flat character is an uncomplicated character.
A static character is a character that ungergos little/to no change
A complex situation that often involves an apparent mental conflict between moral imperatives, in which to obey one would result in transgressing another.
the tone is assertive and defiant because by saying "I am the master of my fate; I am the captain of my soul" you are basically saying that this is your life and you are going against the order of things, especially if someone is controlling your life.