She is self-reliant, confident, and quiet. Which isn't out of the ordinary for someone with her horrifying past.
Her family was broken well before the city fell. A small pack of criminals, each one out only for themselves, and she was brought into the 'business' as early as she could remember.
Though she has since lost her family from various misfortunes during their criminal activates, she is still on track to continue their run and wreak havoc to the locals. It's a dog eat dog world out there, and she has to keep ahead of the curve if she wants to survive out here.