Princess Celestia

Princess Celestia is a white alicorn and ruler of Equestria. She's also the older sister of Princess Luna and mentor to Twilight Sparkle. Her goal, other than ruling her kingdom, is controlling the sun and raising it in the morning, and setting it at night. Her sister controls the moon at night. Although considered a wise ruler, she's also fun loving and mischievous, but never does anything that can harm her subjects. She also has a niece named Princess Mi Amore Cadenza, AKA Princess Cadence.

TRIVIA

 * Celestia will meet the FT Squad in The FT Squad's Adventures in My Little Pony: Friendship is Magic. It will be revealed that she invited the team, and guest stars to Ponyville, because she sensed that they had some connection with the Elements of Harmony. It will also be revealed that she revived Bruton, who the squad first met in The FT Squad's Adventures in Dinosaur. 
 * Celestia will appear a few times in The FT Squad's Adventures With Phineas and Ferb, where she'll show support towards the shy and timid Kyle Larman, who in turn looks at her as a wise and beautiful role model. But she'll mostly appear in original stories that take place during the series.