She is a white horse with brown eyes and long yellow mane and dark brown hooves. She wears purple muzzle and headcollar, and red saddle and neckband with golden trims.
Once she transformed, she earns creamy bird-like wings with patterns that have yellow edges and a horn.
Peg helped Bloom during the battle in the ship. And at the end of the movie, she transforms into a Winged Unicorn by eating the seedling on Havram.
Peg is a skilled horse and is able to run fast. After becoming a winged unicorn she is able to fly with her wings. It is possible she may be able to control the transformation, as it disappears when the magic pollen is gone and then reappears after magic is restored, just like with the Winx's Believix.
- Peg in his transformed form is a Pegacorn, a winged unicorn found in many legends.
- Later in Season 7, Bloom bonds with Elas the Unicorn, who becomes Bloom's second horse-like animal pet.
- Peg also appears in Winx Club: Magical Adventure an online game on Nickelodeon's website.
- Peg does not have a horn in the series.
- This may be an animation error.