Martin Kernston is known as "The Nipple King". He is the owner of Kernston's Rubber Nipples and the President of the Chamber of Commerce. He is a frugal man who cuts his own hair. He is also allergic to chestnuts.
In the episode "Meet N Greet", Martin is to meet with Leslie Knope at a party hosted by Entertainment 720. The party is meant to be a meet and greet for her and numerous Pawnee business owners, where she hopes to court their votes for her race for city council. When she finally gets some time with Martin, Tom Haverford pulls him aside to discuss Entertainment 720, further angering her. As Leslie is giving a speech to the business owners, Tom interrupts with a huge promotional presentation for Entertainment 720, upstaging her and turning off the crowd and Martin. Tom later makes up for ruining the meet and greet by begging (and bribing) Martin to give Leslie another meeting.