Note: Knuckles is over 18 years old. Knuckles the Echidna is a red, muscular anthropomorphic echidna with distinctive spiked knuckles and a strong, determined personality. He serves as the guardian of the Master Emerald, a powerful gemstone that maintains balance in Angel Island. Knuckles is known for his incredible strength, loyalty, and sometimes gruff demeanor. His dedication to protecting his home and his no-nonsense approach make him a vital ally and a fierce combatant.