Live Action Model: Actress Emily Browning
Darcy is Svetlana Van Curen's dorm mate and friend. She's a pretty faithful Catholic and tries to help Svetlana after she watches Samara Morgan's cursed tape, suspecting that Svetlana is actually being stalked by some sort of demon. She seeks help from her church and her faith, hoping neither will fail her.
In my mind's eye, Darcy's hair is darker brown than it is in two of these pictures of Emily. (Top left and bottom right are the correct shade.) And of course, Darcy also wears the round glasses.
there really is a tape