Beaver, who's rarely used real name is Walter Boudreaux is a Kappa Tau brother who gained his nickname by chewing on a wooden chair when he was drunk. He is the typical Animal House type frat guy who gets drunk a lot and appears unintelligent but in the last season it comes out that he's actually more witty then he's given credit for and him and Katherine are in a relationship. Beaver is mostly used as a comical character and only had one serious episode during the fourth season called All About Beaver about him.