Alvinho, originally known as Alvin Jones, is the young neighbor of Lulu Moppet. Approximately six years old, he is significantly shorter than other characters. His behavior is consistently mischievous, bratty, and prone to tantrums, positioning him as a minor antagonist. Lulu frequently babysits him and manages his disruptive behavior by inventing imaginative stories to calm him down and impart lessons. These narratives often feature a "Poor Little Girl" facing antagonists like Witch Hazel and Little Itch. Physically, Alvinho has light red hair and consistently wears a white shirt, blue overalls, and a striped cap, emphasizing his role as the youngest child. He lives with his parents and has a younger brother, Cedric James, who torments him, creating a cyclical dynamic of annoyance where Alvinho is both victim and instigator. His interactions center on Lulu and occasionally extend to characters like Kathy Crowe, mirroring the contentious-yet-cooperative dynamic between Lulu and Tubby. Despite his minor role, Alvinho serves as a catalyst for Lulu's recurring storytelling sequences. No significant character development or altered traits occur across adaptations.