A sharp mind and a sharp tongue to match. She's been called a shrew, a bitch, a harpy, and everything in between. She can't say she minds much. They're not wrong exactly; she knows she has a strong personality, one that can be hard to stomach for some people (most people). She suspects most people are thrown off due to her sweet looking face, they don't expect daggers crafted from biting words. But she's smart. She's sharp as a tack and clever, and she has just so much pent up anger that's got to come out somehow. Better vicious retorts than bruised and bloodied knuckles.
Aggression has become a part of life for her. When her mother died, her family grieved, were all sad and in tears. She expected to be sad too. But instead she was angry, and she still is. She's never let go of that anger at the world, at fate, at the heavens, at anything. People became a nuisance, a bbother she didn't want to deal with, and instead of being kind like she may once have been, she became brusque, brutally honest. When she tired of talking to someone, she would tell them outright. It's this honesty, she suspects, that got her the reputation she has today.
But for all her faults, one can find some semblance of virtue deep within as well. She may not be kind, but she does have a good heart. An ideal of justice is what led to her bitterness as she fell victim to the just world fallacy. She still believes in that justice against her own will, but she knows the world will not provide it. She seeks truth, places its value above all else. As such, she is transparent, holds no secrets. And she always follows through, never fails to make good on a promise.