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 impish, but never does anything that can harm her subjects.
Celestia is seen as a highly respected princess by the FT Squad. Also, Celestia serves as a Future Time Travel authority, serving the organization from Equestria.
- 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 make occassional appearances in The FT Squad's Adventures With Phineas and Ferb. In an original DeviantArt story, she'll meet the shy and timid Kyle Larman, where she'll encourage him to just be himself around others, including her. Kyle will in turn looks at her as a wise, beautiful and compassionate role model. Celestia will appear mostly in season 2 of the series.
- Celestia will officially guest star in The FT Squad's Adventures With Phineas and Ferb: Summer Belongs to You, though she won't appear as many times as the other guest stars. Instead, she'll be staying behind and looking for a way to help Kyle feel better from his anxiety problem.
- Celestia will make a minor appearance in The FT Squad Goes to Jurassic Park.
- While Twilight Sparkle is Celestia's faithful student, Celestia sees Kyle the Otter as another faithful student and shows immense faith in him.
- Celestia is truly the leader of the Elite Guard Equestria Council, like her younger sister Luna they bring balace honor to Equestria Elite Guard Days.
- Princess Celestia also sees Thomas as a faithful student since he and Percy helped Twilight Sparkle save Canterlot from Queen Chrysalis in Thomas' Adventures of My Little Pony Friendship is Magic - A Canterlot Wedding (Full Movie).