Some of this page is derived from the Friendship is Magic Wiki.The original article is at Apple_Bloom.
Like many younger siblings, Apple Bloom resents being treated as the baby of the family. She claims she can take care of herself, though that never stops her older sister from keeping a close eye on her whenever it is necessary. She has a strong independent streak and greatly wishes to win the respect of others, especially Applejack.
Like her sister, she has a very stubborn, aggressive streak to her. Despite her sweet appearance, many adults find her hard to deal with, especially when she's with the other Cutie Mark Crusaders. Her mastery of selling apples mostly involved intimidating ponies into buying merchandise they didn't want, and she's very quick to feel aggrieved when she feels she's been wronged. However, she also possesses her sister's qualities, being brave, honest, hard working, and affectionate towards her friends.
She's also quite prone to getting into trouble and making a complete mess of things, not because she's a troublemaker, she's just a bit over-eager to be helpful and do the right thing, even when she has no clue what she's doing or getting into.
Apple Bloom is skilled in various forms of practical design, crafts, and rudimentary engineering, she just doesn't realize her natural talents in these areas. Rather, she tends to try everything else she can get her hooves on.