Numbuh 2 is the overweight member of Sector V, due to constant love of eating. He wears a blue shirt, brown pants, black and white shoes, an aviator's hat with yellow flying goggles, and he has light, brown hair under his hat, which is rarely removed.
Being Sector V's mechanical genius, Numbuh 2 is described as one of KND smartest operatives, but is jokingly called a "nerd" by his teammate Numbuh 5 as he frequently plays with Yipper Cards with Numbuh 4 and watches Doctor Time Space and the Continuums with the other kids of the KND. Numbuh 2 is in charge of building most of the 2x4 Technology in his team, he even builds Sector V's Treehouse. He also has a great interest in food, especially in chili-dogs. Numbuh 2 is shown to love flying and would occasionally refers to himself as "King of the Skies". He has a knack of playing detective. As seen throughout the show, Numbuh 2 acts as the comic relief of the team alongside Numbuh 3 and Numbuh 4, making jokes and cracking puns that he thinks that are funny, but aren't to anyone else in the show.
His negative counterpart is Negative Numbuh 2.