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I understand now. There can be peace in the galaxy, and I have the power to make it happen, Cream.
~ Cosmo the Seedrian.
Mother, I feel really happy now because I finally know what my purpose is! My friends mean more to me than anything. That's why I give up everything to save them.
~ Cosmo making her noble choice.

Cosmo the Seedrian is the tritagonist of the third season of the anime series Sonic X.

Cosmo is a female child of a plant-like alien species whose homeworld was destroyed by the villainous Metarex. In the years that followed, left Cosmo as the sole survivor of her kind. To thwart the Metarex's ambitions for universal dominance, Cosmo joined Sonic the Hedgehog and his allies in their war against the Metarex, eventually becoming a love interest for Miles "Tails" Prower. In the end however, she sacrificed herself to defeat the Metarex for good.

She's an ally of  Sonic the Hedgehog and his friends. It's widely accepted that her primary purpose in the series is that she has a love interest for Miles "Tails" Prower, the two characters being the same age and displaying an overt fondness for one another.

What Makes her Pure Good

  • She builds her confidence as Tails encourages her.
  • Cosmo is very forgiving to her friends and sometimes even her enemies.
  • She sacrificed herself in order to defeat the Metarex.
  • She ultimately succeeded in destroying the Metarex.


           Sonic the Hedgehog logo.png Pure Goods

Tikal the Echidna

Christopher Thorndyke | Cosmo the Seedrian

Miles "Tails" Prower