Rarity is a fashionista and seamstress from Ponyville. She is a unicorn and represents the element of generosity, one of the six elements of harmony. She also owns a dress shop called The Carousel Boutique where she also lives. She has a little sister, Sweetie Belle, who is a Cutie Mark Crusader. Rarity speaks in a transatlantic accent and often uses terms like "fabulous" or "darling." She will occasionally make dresses for her friends. She has the ability to find gems with her horns, and instead of keeping all those gems to herself, she decorates her dresses with them. She may be lady like, but she has proven to be tough. She was able to control the Diamond Dogs after they captured and enslaved her. She even escaped with lots of gems. She loves the high society, but when given the choice, she would rather be with her friends. She appreciates the beauty of ponies and things. She will often use her charm, but usually to benefit another pony, not herself. She has an eye for detail. She can't stand to get dirty, but she will if it's important. She may have her melodramatic moments, but she's proven to be very mature when the situation calls for it.
She wanted to be a fashionista since she was a filly. She designed the costumes for a show that her classmates where putting on. The night before the show, she didn't like the costumes and thought that she would never be a fashionista. Suddenly, her horn glowed and dragged her to a giant rock. After some disappointment, an explosion caused the rock to break and half revealing gems which Rarity used to decorate the costume. That earned her her cutie mark, three diamonds.
Rarity is also a singer. Her songs are some of the best songs in the series, and she is a member of the Pony Tones. Her singing voice, just like her speaking voice, is beautiful! I think we would all be devastated if Rarity didn't get a song in season 5.
Rarity is the most beautiful pony to ever exist. Her beautiful appearance along with her beautiful heart earn her the title as the best pony.