I believe the hair is 'Samantha Hair' by EmmaAndJordi, but that hair seems only to have a right-side part. I suspect the 'Morgana' promo image is flipped horizontally.
Also, the 'Samantha Hair' promos only show views of the hair tucked behind the both ears, not one side untucked, so it's tough to be sure based exclusively on promos. But I feel pretty confident about it.