[She's silent for a moment after that. Namine had said no one would remember her after she returned to Sora. Only she hasn't. This is about as confusing as Sora being awake and speaking to her. At least it explains his initial reaction...

If he doesn't remember her, though, what can she say? She knows how cautious he is about trusting people.]

So everyone forgot.

Then how am I...

[She hadn't expected Sora to know her, and she caught the aside that proves Namine doesn't remember. Riku not remembering her, though...yeah, her voice might be a bit shaky.]