Imaris
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By the way, that would have been pretty cool :D
She disappeared somewhere after that, I have no idea where.
She also asked our coach before everything started where she was. I thought she was suddenly going to swim with us (but we only have boys! usually). But nope. I don't know why she needed our coach, and I don't know why she was there at all, because she was just standing between the locker rooms, dressed.
Oh, and when we all went to the locker room, she told another girl (there were just two of them together, but one of them noticed me) that they were already going to change. And I don't know what she was doing at all.