we know that vivzie has some canon species of being in her sugar coated version of hell. Damned souls that look like abstract sins, imps, the hell hounds, and probably more. RedBrandonRodgers has adopted Luna as a daughter, but seeing as how he has an imaginary horse, the Family Services department of Hell is probably not strict.
It looks like she was adopted as a teenager, which is the STD thing is not just a joke, she probably came from a very, very abusive home, or series of abusive foster homes.
The aggression, anger, violence, and rebellion could all be symptoms of a fucked up childhood, and long term abuse at the hands of people who were supposed to protect her.
I'm saying traumatic upbringing, while slowly, reluctantly seeing that Brandon Rodgers is here to help.
god bless, you, Brandon Rodgers.