Spitfire is a character from My Little Pony: Friendship is Magic. She is a pegasus pony and the captian of the aerial acrobatics group, The Wonderbolts.
She was voiced by Kelly Metzger who also voice as Nya from LEGO Ninjago: Masters of Spinjitzu.
A yellow pegasus mare with a fiery-looking mane, Spitfire is the leader of the Wonderbolts. Brash and abrasive, Spitfire constantly pushes her fellow Wonderbolts and the recruits with the personality of a strict disciplinarian, as she loves "yelling and blowing her whistle." However, she has a laid-back and easygoing personality when she's not in uniform.
Spitfire is generally a good-natured pony (at least when she's not training potential recruits) but her view of how one should be the best causes her to act questionably at times, such as initially rewarding the sociopathic Lightning Dust for her performances despite her treating her fellow cadets like fodder to do so. Also, Spitfire once outright lied about Soarin's condition to try to get Rainbow Dash to join her team. She is, however, also willing to listen to reason, and if somepony points out that she's crossing the line, then she's quick to see the error of her ways. Revealed in Friends Forever 11 that she's actually a perfectly nice and pleasant pony in private, but when she's commanding, the only way she knows to motivate and lead the Wonderbolts is to be a sergeant.