In the few stories, a princess can be rescued by an anthropomorphic animal as well. For instance, in Kate DiCamillo's book "The Tale of Despereaux", a mouse named Despereaux Tilling sets out on the quest to rescue Princess Pea from a group of rats led by Chiaroscuro. And in the 2006 video game "Sonic the Hedgehog", Sonic, the high-speed blue hedgehog, has to save Princess Elise multiple times from mad scientist Doctor Eggman, who attempts to release the sun god's raw power from within the princess, and help free her from heavy burden.