Personality: Rainbow Dash is very confident in her abilities as a Pegasus flyer, which others see as laziness; the reason behind that is she can often be found lying down on a cloud, sleeping or putting off her work. When tested on it, Rainbow takes care of her job in 'ten seconds flat.' (Rainbow Dash's job in Ponyville is to clean up the clouds when they gather, especially when it's needed to be sunny and to bring in the rain when it's needed.) Despite Rainbow Dash's apparent laziness, she is a hard-working, contributing pony.

She's also well known as a prankster, having pulled pranks on other ponies while insisting that it's all in good fun, and she tries to make Princess Celestia's royal guards laugh. (She finally convinces the Princess' pet phoenix to help out, which works successfully.) Rainbow also does this to different ponies on Nightmare Night while dressed as a Shawdowbolt. She does get pranked herself at the end.

Rainbow doesn't hide her annoyance at anypony's behavior. She can be short-tempered on occasion when issues are dragged out. She's also blunt and rude, will laugh at others' misfortune at times and she won't apologize for her actions unless prompted. Rainbow Dash has matured and even though she's still short-tempered and blunt she now shows a great amount of patience and concern for her friends and others. She'll always be the first one to jump into action and help out. While she deems being awesome, cool and radical are excellent traits to have, despite the fact those words are all similar, Rainbow Dash has proved on a couple of occasions that loyalty defines her best.