Who is Reggie from Me Talk Pretty One Day and what is their importance?

Reggie is a man with a seriously inflated self-image. He works alongside Sedaris on a construction clean up crew when Sedaris is twenty-five years old, and is always complaining about his job. Reggie's primary complaint is that he is a genius and is too smart and talented to be cleaning up construction sites. Reggie and his enormous ego are very much disliked by Sedaris.