Who is Hazel Bergeron from Welcome to the Monkey House and what is their importance?

Hazel is Harrison's mother. She is average mentally, so does not wear a handicap because she can't think long or hard, anyway. She worries about George and the strain his mental and physical handicaps put on him. She can't tell what the sounds are that burst into his brain, so she has to ask him about them when he winces or falls over. Hazel is interested in Diana Moon Glampers, and thinks she, Hazel, could be just as good a Handicapper General. She would like George to be able to take off his physical handicap when he is at home, since he wouldn't be competing with anyone there. She also would like to have only chimes play in the mental handicap radios every Sunday. George tells her this wouldn't work because chimes are too gentle to interrupt anyone's thoughts.