Fluttershy is a female Pegasus and one of the main characters ofMy Little Pony Friendship is Magic. She lives in a small cottage near the Everfree Forest and is an animal caretaker, the most prominent of her charges being Angel the bunny. She represents the element of kindness.
The episode The Cutie Mark Chronicles offers a glimpse into Fluttershy's past. Like Rainbow Dash, Fluttershy hails from Cloudsdale. As a filly, she was a weak flier and was harassed by the same Pegasi who were jeering at Rainbow Dash in Sonic Rainboom, and they nicknamed her "Klutzershy". She was taller and ganglier than the other foals, with slightly larger wings. Rainbow Dash flew in to defend her, and challenged the bullies to a race that caused the participants to unintentionally knock Fluttershy off the clouds and fall to the ground, a place she had never been to or seen before. She was saved from a rough landing by falling onto a large swarm of butterflies.
Upon seeing the animals and the greenery for the first time, Fluttershy becomes overwhelmed by the beauty of it all and starts singing. A few moments later, Rainbow Dash's sonic rainboom startles the animals and scares them into hiding. Fluttershy earns her cutie mark after comforting the animals and realizing her ability to talk through to them, identifying her special connection with animals.
Much is learned about the friendship between Fluttershy and Rarity during Green Isn't Your Color. She and Rarity seemingly meet regularly every week at Ponyville's day spa to converse and spend time together as something they have in common. It is worth nothing that Rarity likes the full treatment while Fluttershy is more reserved, such as meekly declining a pony-pedi and having a mud mask applied lightly to her cheeks only while Rarity fully has the mask applied to her face along with cucumbers placed over her eyes. After getting the attention of Photo Finish with one of her hats, Rarity's desire to increase her fame as a fashion designer causes her to ask for Fluttershy's help as a model for her presentation, saying that her graceful personality would bolster her success at impressing Photo Finish. Hesitant at first, Fluttershy ultimately agrees to model for Rarity after plenty of begging on the latter's part. She is then entitled to becoming Photo Finish's next star to promote, and participates (rather unwillingly) in various photo shoots and fashion shows in the next few scenes.
Throughout the episode, Fluttershy silently endures the attention she receives from her fans. Though unhappy with her stressful and disquieting status as Photo Finish's model, she willingly accepts her fate so as to grant Rarity's wishes for Fluttershy not to fail Photo Finish. She, however, is unaware of Rarity's growing jealousy towards her until the very end.
I credit the Mlp Wikia, they kindly let me use a little of their work.