Character profile
Cosmo
コスモBiography
Cosmo is kind and gentle, dislikes violence, and can be clumsy but resourceful. She was raised on a space colony after the Metarex destroyed her original home world before her birth; after another Metarex attack, she reaches Sonic's planet looking for the legendary hero who can use the Chaos Emeralds and joins the search across the universe.
Story spoilers
The Metarex secretly planted a tracking device on Cosmo and intended to use her as a spy, allowing them to hear and see through her. She later learns she can hear the Metarex herself. In the final battle, Cosmo fuses with the Dark Oak planet so Tails, Super Sonic, and Super Shadow can destroy it, sacrificing her life; an attempted Chaos Regeneration leaves only a seed, which later sprouts.
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