Even though she's a character, I'd have to say Ada. She's way better looking, smart, can take care of herself, and isn't loud.
Ashley is the president's daughter. She is spoiled, wants everything to go her way, and expects everyone to treat her like a princess. Plus, if you liked her, you better be prepared for the publicity.
Though it is annoying how Ada leaves after one or two sentences. I'd pick Ada Wong without a 2nd, or 1st thought.
Great, I'm moving. Who knows when you'll see me again.