Anyway, here is some ideas about Emily.

Personality and background:

Emily has been raised in a religious and conservative but very loving home. She's not super religious herself, but says her prayers and goes to church like a good Christian should. Emily is a reserved but very sweet and caring person, always looking after those around her, and she's not afraid to side with the weakest. She does reasonably well in school, not the new Einstein but she diligently does her homework every day and studies before every test. She has a handful of close friends and never has to worry about sitting by herself during lunch break. If any of her friends are upset about something, they come to Emily for support.

Having lead a sheltered life Emily is extremely naive and trusting of others, to the point where all Dave would have to do to catch her is ask her to get in his van because something happened to her parents, or something along those lines. But Dave works in mysterious ways, so who knows how he'll do it...

Due to her upbringing and abysmal sex education she know very little about sex beyond how a baby is conceived. She engages little with boys, knowing how her parents wouldn't approve of a close friendship with the other gender. She did masturbate a couple of times recently, but it's sinful and she knows she really shouldn't.

TLDR: Emily is probably the least deserving person imaginable to end up in a "Snuff Manufacturing Plant" or whatever the story is called again. But will that stop the trio from doing their worst to her? Time will show, but probably not.

Appearance:

Age: Just turned 14
Hair: Naturally reddish auburn and straight
Eyes: Dark brown
Height: Average for her age
General appearance: Girl-next-door vibe, not a supermodel but well within what most would call beautiful. She has a clear sense of fashion and dresses very modestly but elegantly, often opting for skirts or dresses.

Body: Well on it's way to developing all that womanly goodness, but not quite there yet. She's at some point between spindly teen and the 'hot mom' stereotype. Her breasts are quite decently sized and impossibly pert, but always concealed by her modest clothing. She has a very soft form with widening hips that given enough time would have been perfect for bearing many children, if only she ever got that far. Emily shaves her armpits and legs, but not her crotch as being 'presentable' down there doesn't cross her mind at all. Still, her little sprouting bush of red hair is still in its infancy much like the Mikumiyu twins, and the growth around her light pink, barely an 'outie' pussy and asshole is sparse.

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Take what you want from my rambling, it's not like you have to mention absolutely all of this in you story. But if you're looking for inspiration there should be plenty to take from here ;-)

I did mention in my original request that she is a character from one of my stories, but you can ignore that. The story doesn't really outline her personality much anyway.