Cosmo the Seedrain

Cosmo is one of the main characters of Sonic the Hedgehog series. She made her debut return on Sonic Ultra Rush after events of Sonic Adventure 3. It has stated that Cosmo will be playable, when Sonic and Tails rescue her on Shimmer Town. Even though, Cosmo is an current ally of Sonic and his friends, who had known her since the series of Sonic X.