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Cosmo
Cosmo is a green-haired alien girl who is a member of the Seedrian race. She is a kind and gentle soul who is always willing to help others. She is also very intelligent and resourceful. Cosmo was originally a captive of the Metarex, but she was rescued by Sonic and his friends. She then joined them on their quest to stop the Metarex from destroying the universe. Cosmo is a valuable member of the team and she plays a key role in their victory. She is a true hero and she will always be remembered for her bravery and selflessness.