Calvin Clam is a fashion designer and the owner of Calvin Clam Underpants. He is a parody of Calvin Klein, a real-life fashion designer. He picks various males in Boopelite to model his underwear (which is made of sensitive fabrics that can cause allergic reactions). He also runs a butter crevice in downtown Boopelite.
Personality
Calvin Clam is shown to be a bit narcissistic and cares quite a lot about his company. He knows an attractive model when he sees one, and usually does all he can to recruit them for his magazines. He recruited the Gunk Knuckler in "Underpants-Palooza".
Appearance
Calvin Clam is an anthropomorphic clam. He has white hair and long lips with red lipstick. He wears black glasses and a shell covering a black shirt.