Robert "Big Bob" Belcher Sr. is a widowed, bald-headed and mustachioed older man who owns Bob's Burgers. He is the father of Bob Belcher and father-in-law of Linda Belcher, and is the proud grandfather of three grandchildren. Despite his outward appearance of being obese, Big Bob's character is complex, bringing depth and intricacy to his role in the family and the business. With his distinct physical features and multifaceted personality, Big Bob adds an interesting dynamic to the Belcher family and the overall narrative of Bob's Burgers.