Pierce (Dawn of the Dinosaurs)

Pierce is an adult male Kentrosaurus that appeared in Dawn of the Dinosaurs. At first he was sour, cranky, ill-tempered, cynical, wrathful, grouchy, sarcastic, grumpy, surly, angry, lonely, cold and stubborn, but at the end, he becomes kind, selfless, heroic, kind-hearted, brave and nice.