A life of fantasy starring Mitty
Walter Mittys characterization is communicated through day dreams.
First, the thing that Mitty shows the whole story is him being passive.
He never stood up for himself or talked back to his wife when she yelled at him.
Second, Walter Mitty shows that hes being shy.
When he day dreams they are about him being great and not shy, not how he actually is which is shy.
Last, Mitty shows that he is insecure just like alot of other average people.
In his day dreams he dreams to be someone he is not and he pretends he is more than average.