He's the guardian of the Master Emerald on Angel Island. He's a tough guy. His enemy other than Eggman is Rouge. Knuckles can get often get overprotective over things he cares about. He is also dislikes romance and doesn't like warm-and-fuzzy/touchy-feely things. He is introverted and is often alone. Deep inside, he has a big heart. He is very strong physically and can punch. He doesn't want to get teased by people. He's 16. He is misunderstood and sensitive. He hates mint chocolate chip.