Sonic the Hedgehog is the main protagonist of the Sonic Underground television series. He is an anthropomorphic hedgehog and the crown prince of Mobius who must travel and search for his mother, Queen Aleena, and stop Dr. Robotnik with the help of his two siblings Sonia and Manic whom he has a band with. He is also the leader of the Sonic Underground and one of the current leaders of the Freedom Fighters along with Manic and Sonia.