Iggy Inch, Annie Inch's twin brother, belongs to "The Fellers," a boys' club led by Tubby Tompkins. He sports a shaved head and favors a white collar shirt with orange pants, though he was previously seen in an orange collared shirt and blue pants. Matching his sister Annie's height, he stands approximately five-sixths the height of Lulu Moppet. His grumpy, mischievous personality fuels a love for tricks and pranks. Practical, independent, and spontaneous, Iggy often employs logical and analytical thinking to tackle problems. Despite a quiet exterior, he possesses a sense of adventure and willingness to take risks, especially when testing new inventions. As the group's primary inventor and tinkerer, he crafts gadgets like a flying bicycle and x-ray glasses to aid friends or overcome challenges. Loyal and dedicated to "The Fellers," he sometimes struggles with decision-making and assertiveness, relying on trusted individuals for support—a reflection of a deep-seated need for security that can surface as anxiety during uncertainty. He shares a close friendship with Tubby Tompkins, frequently collaborating on schemes targeting the girls or rival groups such as the West Side Boys. His relationship with Annie involves typical sibling conflicts, though they occasionally cooperate in group activities. Within "The Fellers," Iggy emphasizes camaraderie and collective problem-solving, particularly against external threats or club challenges. While his core traits remain steady, Iggy adapts to new situations and occasionally reveals a kinder, more caring side by helping friends in crises. His mischievous actions sometimes backfire, leading to unintended consequences that reinforce lessons about responsibility or teamwork.