Alvin Jones is Lulu Moppet's juvenile neighbor, functioning as a minor antagonist within their social circle. He exhibits brattiness and snobbish tendencies, though less severe than Wilbur Van Snobbe's. Alvin frequently engages in mischievous behavior, throws tantrums, and acts as a pest toward Lulu and her family. Lulu sometimes babysits Alvin, redirecting his mischief by telling imaginative stories featuring characters like Ol' Witch Hazel and Little Itch, which impart lessons. Alvin has a younger brother named Cedric Jones; his parents are referred to as Mr. and Mrs. James or Jones across stories. Physically, Alvin has short light red hair and wears a white shirt, blue overalls, and a striped cap. Standing about half Lulu's height, he is roughly two-fifths of Tubby Tompkins' height, creating a contrast with his disruptive presence. Interactions with Lulu occasionally show moments of connection, like shared laughter over nonsensical wordplay such as repeating "foot" and "feet." However, their relationship remains typically contentious. Alvin consistently serves as a neighborhood vexation, with Lulu relying on storytelling to temper his antics.