Character study about Pere Ubu ; Need help with thesis statement

Hi, i have to do a character study and write an essay. Its a play and the main character is Pere Ubu who is vulgar, gluttonous, rapacious, untrustworthy, greedy, sadistic, cowardly, and stupid. His actions are impulsive, and his speech is a mixture of vulgar expressions. How can i write a good thesis statement about this character. Please Help URGENT

I would say

"We can not label a person with a fixed title of right and wrong for life time, but sometimes some characters are developed in order to show the inner emotions of a human. The emotions from which we want an escape but can't. Among those emotions are greed, meanness, vulgarity and untrustworthy behavior. Story's characters live with the label for ever, but in the story of life title changes very often. Among such characters Pere Ubu is one. Let's try to get an insight in it. "