Could it be Ryan -the jerk- Foster?

"So, you are telling me that what you saw in your dream last night wasn't actually a dream but something that you have experienced in the past?" 

Gianna questioned, just after she heard Arwen explain it all to her. From the dream to what she has seen and what she has felt about it. 

Arwen's expression was as complicated as it had been last night. She simply shrugged and answered. "I don't know. I am confused." 

"What are you confused about, Arwen?" Gianna asked, still not quite understanding what was confusing Arwen exactly. "It can either be a dream, or it cannot be. You just have to think and then decide if it was something that you have built out of your imagination or something that you actually experienced in reality." 

On if that was as simple as she put in the words … 

Arwen shook her head, not able to explain. 

Standing, she turned and walked towards the window. "It's not as easy as that, Anna. I am not able to explain it to you."