She(the grey woman) says "I am the one who brought you here." and she says "The greyness will not continue to engulf the land, as you might think it would. For you see, one hour in your world could possibly be many weeks in ours." Then how did she become grey? hmm...
"This note might hold a clue. I managed to steal it while he was gorging himself on pollen." + "I can't get near the flowers without being stung!" Suspicous...
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Over a period of time... The rainbow has been like that for a time. But the lady became grey even before the rainbow.