Cosmo The Seedrian

Considered by Tails to be "so beautiful", Cosmo is a short and humanoid plant-like alien with pale peach skin and powder blue eyes with a lone long eyelash on each one. She possesses a mop of short bright green hair with a pair of bangs and rose-like paradise pink flower buds held by golden hair ties on the sides of her head. For attire, she wears a long-sleeved dress with a green blouse bearing golden trim; an ankle-length and petal-based white skirt bearing bright green tips; her mother's Blessed Amulet on her chest; white tights and green ballet flats.

During her transformation after removing the Blessed Amulet, she goes through a few changes. The buds on her head bloom and gain a more pink coloration; her hair grows even longer, reaching down to her waist; and she is slightly taller.

Cosmo (コスモ Kosumo?) is a character that appears exclusively in the Sonic X anime series. She is a member of a plant-like alien species whose home world, Green Gate, was destroyed by the villainous Metarex, who, in the time 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. However, in the end, she sacrificed herself to defeat the Metarex for good.

Past Cosmo's former homeworld, Green Gate, was destroyed by the Metarex before she was born and she was instead raised on a space colony. She lived peacefully there until the Metarex came and began to destroy her new home, including her family (which included Earthia). As Cosmo was escaping, the Metarex planted a tracking device on her. Cosmo also had a device inside her brain, which when activated, allowed the Metarex to hear and see everything that she did, allowing them to always be one step ahead of their enemies.

Cosmo landed on Sonic's planet to look for the hedgehog. When she arrived, she is found by Amy Rose, Miles "Tails" Prower, Cream the Rabbit and Cheese, who were nearby to watch the falling stars. Cosmo wakes up and finds herself at Cream's house, surrounded by her rescuers. Unfortunately, Metarex Carrer followed her and started destroying the forest. Cosmo joined Tails in the X Tornado to assist him by providing him advice. Then, when Sonic arrived, Cosmo hurried to meet him. Metarex Carrer unearths the Planet Egg and leaves with it. Cosmo then leaves Hyper Tornado to finally meet Sonic. She tells her name and makes the request to defeat the Metarex. Without the Chaos Emeralds, Sonic could not do anything. Fortunately though, Chris arrives on Angel Island and Tails unveiled a giant spaceship known as the Blue Typhoon. Cosmo helped Amy, Cream and Cheese provide items and food, until Metarex Spike arrived to finish Metarex Carrier's work. The girls then went aboard the Blue Typhoon. Metarex Spiker was then destroyed by the Sonic Power Cannon.

The Blue Typhoon landed on Hydo Planet to look for the first Chaos Emerald. However, Sonic and Chris went missing. While waiting for them, Cosmo helped in the research for the Chaos Emerald. She fell asleep under the sun, but brutally wakes up. Cream and Cheese found the Chaos Emerald, and Sonic and Chris were back. A party was launched in the place and every member was invited except Knuckles. Cosmo joined in. Before going back in space, Knuckles comes back with Dr. Eggman (who was also looking for the Chaos Emerald). Despite what everyone says to him, he still takes the Chaos Emerald. Cosmo tries to convince Sonic and Knuckles not to fight, but nobody listens to her. The Egg Mars then appears to take Cosmo hostage and force Sonic's crew to give up on the Emerald. Cosmo was finally released by the Egg Mars and caught by Knuckles.

Cosmo joined Sonic, Knuckles and Chris to look for the second Chaos Emerald, which appeared to be a fake one. During their investigation, Cosmo tries to communicate with a tree, which died due to the Planet Egg being lost. She then promises to find the Planet Egg and restore the planet. When Amy's words revived Cosmo's determination while searching for Sonic on a jungle-covered planet, she joined Amy, Cream and Cheese on their quest. Every time Cosmo activates one of Metarex Kingape's traps, it was up to her friends to free them all. This time, Cosmo attacks Metarex Kingape by throwing tomatoes at his face. The girls attacks him all in one to escape, but Metarex Kingape found them. Fortunately, they met Sonic, Tails and Knuckles on the way, but also Dr. Eggman, Decoe and Bocoe. Everyone was trapped in growing roots until Chris rescued them.

However, Cosmo was still haunted by Scarship's attack on her colony and her older sister's screams, but did not know why. She tags along with Knuckles and Tails to search for the fifth Chaos Emerald hidden somewhere underneath. Cosmo and Tails were separated from Knuckles and lost in the underground cave. The two of them discover a secret base guarded by Metarex Vipers and where the Chaos Emeralds are copied. Tails copied the datas and escaped the base with Cosmo and the real Chaos Emerald. On the way out, Cosmo blames herself for putting everyone in danger because of her hate and sadness towards the Metarex, but starts experiencing the power of friendship. She tags along with Tails to help Sonic fighting off all of the Metarex Vipers.

In order to enter the Metal Plant, the Blue Typhoon and the Crimson Egg crews had to team up. However, Decoe put a device under Amy's Spaceship, causing Amy to lose control of it. Thanks to Knuckles, Amy took control of her spaceship and drives it to the Chaos Emeralds. The threesome is greeted by an hologram of Dark Oak. Cosmo tries to communicate with it, but the hologram only orders to kill them. In order to save Sonic and Amy, Cosmo enters the code to free the Chaos Emeralds, causing the Planet Egg to fall in space. Red Pine's armada then appears to finish the job by shooting at the Metal Plant to destroy it, along with everyone inside. Cosmo returned to Blue Typhoon, while Super Sonic and Super Shadow are arguing about the Chaos Emeralds.

Cosmo decided to throw a party, to enable everyone to relax after what had happened earlier, but planned to keep it secret. Unfortunately, Tails discovers it, but also the Chaotix. Vector says that he wants to help them to throw the party, which makes Cosmo think that he changed, but it's not. Indeed, Vector planned to make Cosmo fall in love with Tails. Cosmo and Tails thwarts every single plan. It was until Tails protected Cosmo from being crushed by the disco ball that everything changed between Tails and Cosmo. Unfortunately, though, Knuckles destroyed the party in rage. Cosmo falls in despair, but Sonic decides to throw the party anyway, to her delight.

Some time later, the Blue Typhoon enters the gravity field left by the Metal Plant to search for the Chaos Emeralds again. Inside, it cannot pass through the giant rocks. Yellow Zelkova then appears to kill the intruders. Sonic and Knuckles distracted him, so the Blue Typhoon could pass. The crew was greeted by Black Narcissus through a message saying to send him Cosmo in exchange of their survival. While everyone disagrees, Cosmo decided to meet him anyway, in order to get answers. However, Chris saw her leave and decided to go with Cosmo to protect her. When Cosmo arrived, she orders Black Narcissus to tell everything he knows about the Cosmo Tribe and the Metarex, but the villain just wanted to track the Blue Typhoon to her. Chris interfered, but nothing changed. Cosmo and Chris were then held hostage but soon freed by Shadow. Cosmo then drives Amy's Spaceship back on Blue Typhoon.