Nelson is a bully, through and through. He can normally be found taking lunch money and various other valuables from various innocent students on the playground of Springfield Elementary.
What most people don't realize is that Nelson has a pretty rough home life. His dad is in jail most of the time. His mom is occassionally caring, and occassionally neglectful, all while working at a strip club.
Nelson really just needs companionship. He occassionally "runs" with Jimbo, Kearney, and Dolph, but sometimes branches out to bully on his own.
His signature outfit always incorporates his blue denim vest, complete with torn off sleeves.