Cosmo the Seedrain

Cosmo is a female child of a plant-like alien species whose homeworld was destroyed by the villainous Metarex She is an ally of Sonic 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.

Cosmo has grown healthly of her new life. On Sonic Adevnture 3, after she was born Amy and Cream having to collect her fragments of rose petals that are hidden around the places.

History
2 years after Cosmo's death, it has first announced that she will come back to life. After the events of Star Heroes appearance, Amy, Blaze and Cream heard of Cosmo's voice of the rose which was grown past 2 years. Cosmo said to her friends that she will come back if they can collect the fragments of flowers petals. When a holographic image of glowing Cosmo appears, she says that she needs them to find the flower petals hidden around the places. She then guides them in her new super state, to find the hidden petals.

After Cosmo's fragments were collected and she was reborn, she is fully healthy and thank her friends for her missions.

Persoanlity
Cosmo is a kind and gentle character, though she often feels guilt because she was unable to save anyone from the missions ever since the destruction of Dr. Eggman or other villian such as Steve Mongoose, Lina and Kikki's father. She also seems to suffer from a low self-esteem issue, often calling herself "unworthy" or blaming herself for the hardships that she and her friends had to endure. Cosmo also dislikes violence, but acknowledges that fighting is sometimes a necessity, although she herself is unable to fight. Cosmo can be somewhat clumsy, but she is also quite resourceful; she also has a penchant of getting into trouble.

Abilities
Cosmo does have a few abilities, being a plant herself, such as having the ability to empathize with plants, trees, or the planet and determine their state of life. Cosmo can jump high and gently float down with the aid of her skirt. She also appears to be able to unlock the power from the secret gem which was given by her mother. Cosmo is capable of reading ancient languages  (most likely given to her when the Metarex implanted the signal while she attempted to escape).

Weeakness
Cosmo's weaknesses include being physically weak and acting a little clumsy. She has trouble carrying heavy objects but can use certain objects as defense. Cosmo also tends to get into trouble easily. She also might have air sickness as when Tails was flying high above Angel Island, she was shown to be very dizzy and when Amy was trying to catch up to Sonic, she sped up her ship but Cosmo wasn't feeling well so Amy held back.