Knuckles the Echidna is one of Sonic the Hedgehog's most iconic characters, and his portrayal in the films adds an exciting and deeper layer to his complex personality. In the "Sonic the Hedgehog" film series, Knuckles appears as a powerful, fiercely independent, and somewhat stoic character with a strong sense of duty and loyalty. He is introduced as a warrior who is dedicated to guarding the Master Emerald, a powerful gemstone with immense power, located on Angel Island.