I felt that the left picture was more Violet's style, rather than Olivia. Olivia is more of the conservative, sweater type of girl (like me), while Violet wears the vest and skirts. The pose of the actress, with the combination of the hat, vest, and skirt, really makes her flirtatious and fashionable.
I think the image on the right is more for Calla. She's the rich and very very fashionable girl, but when she was first described in the book I felt like she was a hippie because (correct me if I'm wrong) but she was meditation or doing yoga, so I like the addition of the headband.
I think not only are they a cute couple, but in my mind they represent Soren and Olivia. I think the matching sweaters in the top really match their personalities, especailly Olivia's. Olivia isn't the type to wear heels or dresses so I thought the hoddie and plain jeans have a cute flair to it. For Soren, I think the bottom pictures is more of the skater type I imagine him in, especially with the shoes.
Tell me your opinions and hope you enjoyed today's Fashion Friday!