A small note on guns, if you could build a smart gun, that is one in which firing was tied into something at least as powerful processor wise as as a smartphone you could stick a demon in there to help you fire. It still would not compensate totally for having no skill, but it would make a gun actually useful. If you do that in addition to buying dots in firearms it will make you good with it.
So basically a Shadowrun smartgun.
We could probably make one. Scratch that, we could
definitely make one; repurpose a cellphone's chipset and a targeting laser, put a demon inside and you're golden.
The whole legality thing is kind of an issue for 17 year old Molly, especially as the ExWoD Infernal charmset does not currently have any charms for sticking weapons or other supplies in Elsewhere. So if you drew in front of Jones or Murphy or Greene, you'd be up for felony weapon possession unless you used other charms to squash the case.
Unless you change the laws for gun ownership in this AU, of course.
If Molly can legally tool up at 18 without aggroing law enforcement or making her family criminal accessories, then when she turns 18 in a couple months she can make one.
Could just be some Winter Fae changeling, due to not minding the cold.
Okay. Winter Court changeling IS also an option.
Would fit the aesthetic as well, along with the mother being out of the picture if she was Sidhe who dumped the daughter on the dad and skedaddled.
EDIT
My current working hypothesis is that she's the changeling daughter of a Mafia member
And her dad was either the kid of a White Court vampire, or is currently working for one