Cosmo is a fictional character from Sonic X, created by Sonic Team exclusively for the third season of that TV series. She resembles Void from Sonic Shuffle. Cosmo is a female child of the Seedrians, a plant-like alien species whose homeworld was destroyed by the villainous Metarex. She is an ally of Sonic the Hedgehog and his friends, and it is widely accepted that her primary purpose in the series is that of a love interest for Tails, the two characters being of the same age and displaying an overt fondness for one another.