[Yuka takes a step back when she sees Keith's mask, but something sparks in her brain when she hears his voice. She puts her hands up, hoping that she'll recognize from her backpack that they're in the same situation.]

I-I'm Yuka Ichijou, and I don't know anything about this place! When I woke up, I was washed up on the shore, and...

[...It was a dream, right? Jumbled images of crystalline monsters and softly glowing caves. His voice, and that armor...

No, don't doubt it. The Imaginaerium is a dream too, right? That didn't make it any less real. When dealing with situations that make no sense, throw sense out the window and go with your intuition.]

...Sorry if this doesn't make any sense, but have we met somewhere before...?