Percy Femur is Mr. Bone's nephew. He is a tall, mean, and tough student. He is known to sport a rat-tail hairstyle, camouflage pants, and army boots. He once bullied Roger until he was sent back to his old school (with the help of Doug). He makes a small role in the series, only appearing in the episodes "Doug Saves Roger," "Doug's Big Feat," and "Doug's Hoop Nightmare."