Princess Celestia, called Queen Celestia in one comic and early development, is an Alicorn pony, the co-ruler of Equestria alongside her younger sister Princess Luna, and the adoptive aunt of Princess Cadance. In addition to her responsibility of raising the sun, she is also a teacher to Twilight Sparkle and Sunset Shimmer at different times, often addressing Twilight as "my faithful student" while mentoring her. She has a pet phoenix named Philomena.

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