Jim Halpert (John Krasinski) is a paper salesman at the Scranton branch of Dunder Mifflin. He is a good guy, and very intelligent albeit unmotivated. Throughout the four seasons of the show and counting, Jim spends most of his time pining for Pam Beesly and/or engineering pranks at the expense of office-mate Dwight Schrute.
Michael: OK, so Dwight, in your own words: "Someone replaced all my pens and pencils with crayons. I suspect Jim Halpert... Everyone has called me 'Dwayne' all day. I think Jim Halpert paid them to."
Jim: [to camera] Yes. Five bucks each, and it was totally worth it.
I'm going to propose tonight. Holy crap!Jim