Who is Mr. Sedaris from Me Talk Pretty One Day and what is their importance?

Mr. Sedaris (Lou), is David Sedaris's father. In this entire compilation of essays, Mr. Sedaris is clearly one of most significant people in Sedaris's life.

Mr. Sedaris is a computer engineer for IBM who has an enthusiasm for understanding and explaining the inner workings of all things. He also has an infatuation with jazz music and is often overly boisterous about it. Mr. Sedaris is not shy about showing the passion he has for his interests, and this characteristic often embarrasses Sedaris during his childhood.