Stuart David Bloom is the owner of The Comic Center of Pasadena, which the guys regularly visit and is their friend. He has a talent for drawing and is a graduate of Rhode Island School of Design. He also has an extensive knowledge on comic books and first appears in the season 2 episode “The Hofstadter Isotope”. He also acts as competition for the lead characters when he dated Penny and Amy (respectively) to help move the other’s relationships forward.