Cosmo widely known on the Internet as Cosmo the Seedrian, is a main character from the anime series Sonic X, created by Sonic Team exclusively for Season 3 (Series 2) of the anime series.
Cosmo is a female child of a plant-like alien species whose homeworld was destroyed by the villainous Metarex and she is the only surviving member of her species (aside from the Metarex). She is an ally of Sonic the Hedgehog and his friends, as well as a love interest for Miles "Tails" Prower.
- Cosmo is the new and true power member of Team Rose, which consists of her, Amy Rose and Cream the Rabbit with Cheese.
- She is voiced by Amy Birnbaum.