Bats shall rule Equestria! (accepting)

Name: Rainbowdash
Gender: Female
Species: bat-pony; pegasus pony
Appearance:

Cutie Mark:

Personality:

Loyalty

The Shadowbolts test Rainbow Dash's loyalty by offering her fame and power.
In Friendship is Magic, part 2, Nightmare Moon tests Rainbow Dash's loyalty by creating an illusion of an elite flying team called the "Shadowbolts". The Shadowbolts offer Rainbow Dash a position among them, provided that she abandons her friends and their quest to find the Elements of Harmony. Rainbow Dash chooses to stay with her friends. When they confront Nightmare Moon in the Castle of the Royal Pony Sisters, Twilight Sparkle declares that Rainbow Dash represents the Element of Loyalty.

"Rainbow Dash, who could not abandon her friends for her own heart's desire, represents the spirit of loyalty!"
— Twilight Sparkle

Rainbow Dash's loyalty is tested in The Return of Harmony Part 1. Discord shows Rainbow Dash a vision of Cloudsdale falling apart in her absence, convincing her to abandon her friends in the Canterlot castle maze.

In Rainbow Falls, Rainbow Dash faces choosing between flying with the prestigious Wonderbolts and the Ponyville team at the Equestria Games' flying relay competition. At first she secretly practices with the Wonderbolts, but she finally decides to stay with the Ponyville team.

Competitiveness

"And the only thing I liked more than flying fast...was winning!"
Rainbow Dash describes her passion for winning in a flashback in The Cutie Mark Chronicles. She races several times with Gilda, her old friend from Junior Speedster flight camp, in Griffon the Brush Off.
In Fall Weather Friends, Rainbow Dash loses a game of horseshoes to Applejack, and says she hates losing. She then challenges Applejack in the Iron Pony competition. In several rounds, she uses her wings to give herself an unfair advantage. During the Running of the Leaves, Rainbow Dash continues to use underhand tactics even though her wings are tied down. Applejack retaliates with tricks of her own, and both end up tying for last place. They realize that their competitive streaks got the better of them, and apologize to each other and Princess Celestia before amicably running the race again.

In Rainbow Falls, Rainbow Dash comes to the conclusion that even though she loves winning, she loves her friends "waaaaay more."

Self-confidence

Rainbow Dash displays confidence in herself and her physical abilities in multiple episodes. In Boast Busters, when Applejack and Rarity criticize Trixie for showing off magic tricks and looking down on other ponies, Rainbow Dash adds, "Especially when ya got me around being better than the rest of us."

In Sonic Rainboom, Rainbow Dash is confident about her performance in the upcoming Best Young Flyer Competition until Rarity's magical butterfly wings get a lot of attention and admiration. Despite her insecurities, Rainbow Dash successfully pulls off the sonic rainboom and wins the competition.

A crowd cheering for Rainbow Dash
In The Mysterious Mare Do Well, Rainbow Dash is venerated by Ponyville after performing heroic deeds around town. She basks in the attention of the townsfolk and her official fan club (led by Scootaloo) and becomes over-confident in herself. A mysterious cloaked pony starts one-upping Rainbow Dash's feats. Rainbow Dash eventually finds out that the cloaked pony was actually her friends in disguise, teaching her a lesson about keeping her pride in check.
Brashness

Rainbow Dash and Applejack snicker at Twilight Sparkle for running a race with them in Fall Weather Friends, calling her an "egghead" for joining a race with no prior running experience except reading a book on the topic.

Upon seeing Rarity wear a scarf for a mountain expedition in Dragonshy, Rainbow Dash sarcastically says, "Yeah, that'll keep you nice and toasty." Later in the episode, Rainbow Dash expresses her annoyance and frustration when Fluttershy panics over minor obstacles in the trail.

Rainbow Dash begrudgingly lets Rarity give her a makeover in Swarm of the Century with a frown on her face. When Twilight Sparkle tries to convince Rarity that she's not a laughing stock in Suited for Success, Rainbow Dash bluntly says, "She kind of is." Rainbow Dash calls a dragon lame after seeing one do a trick in Dragon Quest, but then gets her coat singed after nearly getting burnt by another dragon's fire breath. She also teases Spike in the same episode, but is scolded by Rarity.

Mischievousness

In an effort to make the royal guards break their silence, Rainbow Dash tries silly faces.
Rainbow Dash tries to spook her friends when they venture into the Everfree Forest for the first time, claiming that no pony has ever made it back out of the forest. Her reputation as a prankster is established in Griffon the Brush Off, where she and Pinkie Pie prank various ponies, and is further enforced in A Bird in the Hoof, when she tries to make the royal guards laugh.
Rainbow Dash plays several pranks on her friend Gilda in Griffon the Brush Off, which were set up for Gilda's party, but are not specifically aimed at her. For the majority of the time when Gilda is visiting Ponyville, Rainbow Dash is unaware that the griffon is being callous and rude to the other ponies, but the pranks at the party get the best of Gilda, and she loses her temper in front of Rainbow Dash. After witnessing this side of her personality, she calls her out on her behavior and sends her on her way. Dash uses a cloud to create thunder and lightning to scare Spike in the same episode. She does the same to Pinkie Pie and various other ponies in Luna Eclipsed while dressed as a Shadowbolt, laughing at the ponies she frightens. She tells Twilight Sparkle that "this is the best night of the year for pranks" and that "it's all in good fun". She then hurries off to scare another group of ponies, which she continues doing until Princess Luna gives her a taste of her own medicine in the end. She also displays this in It's About Time, taking advantage of Twilight's worrying to spook her, along with Spike.

In Flight to the Finish, Rainbow Dash causes general mischief when Ms. Harshwhinny addresses Cheerilee's class of foals, causing Harshwhinny to scold her for being unprofessional.
Other: N/A