|Sixth||Cutie Mark-A cloud with a striking rainbow lightning bolt.|
She is often portrayed as conceited and brags about her accomplishments. She is a very competitive person, shown in Fall Weather Friends, where Applejack and Rainbow Dash create an Iron Pony Competition to see who is the most athletic. However, even though she brags, she is the most loyal pony out of all of her friends. In the pilot episode 2, Elements of Harmony, she is given the Loyalty Element when she turns down the opportunity to join the Shadowbolts for her friends instead.
Every single one of her friends (that she didn't know at the time) didn't have their cutie mark until after the first Sonic Rainboom happened. The Sonic Rainboom was the reason why every pony got their Cutie Mark . It caused every friend to get there cutie mark nearly right after hers. ( Fluttershy's taking care of animals, Rarity's love for gems and fashion, Twilight Sparkle's talented magic spells, Applejack's love for Sweet Apple Acres, and Pinkie Pie's constant need to be happy and throw parties)
Rainbow Dash has a rainbow colored mane and tail and her coat is a light blue shade. She also has strong rose colored eyes.
As a Filly she doesn't really change. Except, of course her wings are smaller and her hair is a bit different.
Cutie Mark Her cutie mark is a cloud with a rainbow thunderbolt striking out of it. She got this cutie mark while she was in a race. When she was younger, she went to Cloudsdale with Fluttershy . At the time Fluttershy was getting picked on by 2 Pegasus because of her poor flying skills when Rainbow Dash came in and challenged them to a race. When the race started she was in the lead, and that was the first time she had flown that fast before. As the race went on, Rainbow Dash fell behind one of the bullies and instead of giving up, she pressed onward so fast that she ended up creating her first Sonic Rainboom. After she had realized what she had done, her cutie mark appeared as a result of being fast and winning the race.
Rainbow Dash lives in the sky over Ponyville in a house made of clouds. As she is able to move and shape clouds however she likes, she likely constructed her house herself.
Rainbow Dash appears in every episode except Look Before You Sleep, Feeling Pinkie Keen, and Stare Master. She also only has background appearances in episodes eighteen, The Show Stoppers; and twenty, and Green Isn't Your Color.