[You will get a blank stare, Heather. She doesn't know what to feel from what she just said to her.]

I've...never had a boyfriend before and I...don't know anyone by that name, either. It's kinda impossible to be somebody's girlfriend without first meeting them.

[She continues to remember back where she's heard the name before because the girl in front of her looks so sure. Really sure. How could this--wait a minute. Could it be that Zack is her twin's boyfriend? It would make sense, so she begins to laugh a bit.]

Why didn't I realize this sooner? You're both right and wrong, miss. Zack does have a girlfriend, but it isn't me exactly. You see, I believe you've mistaken me for my twin, Aerith. Well...twin might not be the right word because my name is Aerith too. You could say she's my double.

[Nice explanation, Aerith.]