Nelson Muntz is a fictional character from the animated television series The Simpsons. He is known as the school bully at Springfield Elementary School, often seen wearing a green shirt and a red cap. Nelson has a distinctive laugh and is characterized by his tough demeanor, but he also shows moments of vulnerability and loyalty to his friends. Despite his bullying behavior, Nelson has a complex personality. He often struggles with his home life and seeks acceptance from his peers. Over the years, he has developed friendships with other characters, including Bart Simpson, and has been portrayed in various storylines that explore his background and motivations.