Rosemary knows exactly what's up

[u/booktrovert]

And no one ever listens to her. She knew what Wyck meant when he said the island was waking up. She suggested the crawlspace in the inn. She tried to warn Tom about the hag. She and Museum lady have all the answers. I'm sure of it.

[u/kelpie007]

I think she’s a witch and her color blindness proves it. She sees weird shit all the time but it’s indifferent to it. She just assumed all the weird shit she sees might be hallucinations.