Casting - what look are we going for and why? (FEMALE CHARACTER)

As a group we decided for the female character we wanted a euphoric looking girl to fit with the themes of dreaming and the surreal elements. We want her to be interesting looking and we also want a female that has an edge to her look to show the audience that she is different and this also fits in with the target audience and makes her more relate-able to them. We want her to have mid/long hair so that when filming the water sequence her hair will flow with the fans so give the illusion of floating. We want her to be quite dainty but not necessarily shot but height isn't a factor that we are concerned about. We agreed that the kind of personality that Cassie Ainsworth from the TV show Skins has is what we want. (images below)