Danielle scientific exploration boat crashed on the island. She hears the others because she hears the whispers.
That's what she told Sayid but everybody lies around here.
Just speculation but that would be awesome.
Could she have come to the Island from the station to repair something for the looking glass? We know she went to the radio tower.
Was she "bait" for the others/natives?
She killed her team because they were "infected." Is that why there are no men in the looking glass?
a little scatter brained, I know, just throwing ideas out...