Meet Sour Apple
 
She’s a cousin of the Apple family.  
But she’s like, the opposite for a lot of the family (stays in the city instead of in the countryside/farm, not very honest, pretty pessimistic, a goth, and the fact that she finds the whole “obsession with Apples” thing her family has to be dumb)  
This causes her to not see eye to eye with most of the family (mostly Applejack and her siblings).
 
 
However White Lily really likes her. In fact she’s probably the first member of the Apple Family to actually hang out with Sour willingly XD
 
She might seem like a moody shit… which she is X)  
But she’s not really that bad once you get to know her (her good qualities is that she still values family even if she doesn’t get along well with most of them,  
she’s very supportive of White Lily and acts as a shoulder for her to lean on when she’s feeling down, and she actually has a soft spot for those that are troubled, and tries to help them). She also act’s as a sort of mentor to Babs Seed as well, since both of them live in the city.
 
Unlike most of the family, she had a pretty bad upbringing. She was an accident, and her parents where in a loveless relationship, and took it out on her, belittling her and not paying her attention. She was also bullied by the city kids for her “hick” upbringing. This made her really bitter towards her parents and the rest of the Apple Family for not knowing about this, and she ran away form home when she was a teenager, and changed her name to Sour Apple to reflect on her new life.