She grew up off the scraps that these dealers would throw her out of pity or disgust. She learned pick pocketing at six. She completed her first successful scam at eight. Your character is an undercover agent assigned to find her and try to recruit her.
Yes depression hits you like a rock it doesn't matter what time it is, what your doing, or who your with. it will hit you like a ton of bricks out of no where. one Minuit you fine then the next you go from fine to Fuck life.