Big the Cat is a fictional character from the Sonic the Hedgehog series. He is a large, anthropomorphic purple cat who lives deep within Mystic Ruins. Though imposing of stature, Big is a gentle and easy-going, though somewhat dim-witted person with a heart of gold. He also possesses incredible strength and toughness that makes him one of Sonic the Hedgehog's strongest allies. He is also an expert fisherman.