She is a young scientist, who is an expert at chemistry.
Despite being an alicorn, she wasn’t born one. She was born an earth pony, and she ended up becoming an ascended alicorn (Like Twilight). She got this because of her research and scientific achievements, which helped benefit the whole of Equestria. She also does NOT look fondly on her first time trying to fly. Or trying to use magic. It ended badly for everyone XD
Despite being this gifted in her field and being turned into an alicorn, she decided to not be given the rank of Princess, as dispite her status, she wants to live like an ordinary pony.
She currently stays in Canterlot, and she helps teach science and chemistry at Celestia’s School For Gifted Unicorns.