Walter

I am going to call Walter a static character. He seems to me to be a childish person throughout. He has this crazy dream of helping his family through a liquor store, which ends up losing his family $6500. One major things that shows how childish he is is when he gives Travis the money that his mother said they couldn't afford then gives him even more money just to spite Ruth. This childish nature doesn't really change that much throughout the play.
I think that he is very similar to Peter Griffin of the greatest show ever made- Family Guy. They both act very childish and don't have the greatest sense of what is good and bad. They each are also married to sensible women that struggle putting up with their ridiculous behavior. Here is a clip that shows Peter Griffin at his finest.