Subliminal perversity
I think it's walking a fine line when you have a young girl like this in a movie. I'm not faulting this movie, but lately it seems some pretty young things have been exalted in ways that are less than wholesome. Witness mostly Chloe Grace Moretz, who is a lead in a new movie and is 16; she has been making some pretty adult-themed movies for several years at least. Possibly, it's because she is so pouty-looking. These girls have young, plump faces ... the girl in Erased looks like a young Jennifer Lawrence, if that were possible. Could anyone be younger than Jennifer Lawrence?
I'm just saying that I wonder if a plot line like this panders to a certain audience that would like to fantasize about girls this age and men the age of the male lead were he not her father. Fortunately, the girl remains fully dressed throughout the movie so there is no obvious reference, and I can fully relate to the idea of being charged with the responsibility of protecting a nearly-grown child who, though learning a lot and contributing a lot during the adventure, still needs a great deal of care. Nevertheless, it seems the general outlines of the situation would appeal at least on the face of it to a certain audience, as I said. We see through it.
Or do you see this as just the depiction of a sweet father-daughter relationship?