Clover the Clever

Clover the Clever is an Equestrian Unicorn who lived long ago and one of the six founders of Equestria. She was Princess Platinum's royal advisor and an apprentice to Starswirl the Bearded. Twilight Sparkle plays her in the Hearth's Warming Eve pageant, depicting how she founded Equestria after their homes were frozen over by the three pony tribes' hatred for each other feeding spirits called Windigoes and resulting in their homes freezing over, and upon realizing it, she decreed that the tribes had to treat each other better and thus drove off the spirits, and founded Equestria.

Role in the series
Clover the Clever was revealed to be an orphan raised by Starswirl himself after her parents froze to death during the Windigoes' reign, referred to as the Windigo Ice Age, when she was only a 2-year-old filly, and he helped her find a new place among her unicorn kind, and after she helped stop the Ice Age from the three tribes' bickering, which was the result of being in post-Chaos War days when the Alicorn Gods died off using the Elements of Peace to defeat Tyranny, the first Draconequus. Following setting things right, she and her friends became protectors, and wielded the Elements of Harmony before the arrival of King Nightus and Queen Heavenslight as their new rulers, and therefore the birth of Celestia and Luna. It's also revealed that Clover did not die of old age as expected, and neither did her founder friends, as they were instead imprisoned, and declared dead, within the catacombs of a small village similar to and nearby the hometown of Starswirl's last protégé Stygian by the fearmongering-fanatic ancestors of Bishop Dipper and guarded by Stone-Eye Cyclopses, as a usurp before it was ravaged by The Dazzlings and rebuilt with help from a fanatic named Bishop Dipper, who founded a fear-based false religion against Starswirl after he 'betrayed' him, and has associates like the Stars of Starswirl, and Saint Polaris, to ensure that everypony agrees to his ways, sometimes through secret ounces of black magic, and after discovering the bodies of Clover and her friends in suspended animation, he had to ensure they weren't a threat by locking the catacombs away with black magic. The bodies of Clover and her friends have yet to be found.