Miss Granger and the Centaurs
Back in the comments to “The Missing Mirror” spork, the issue of what, precisely, Hermione hoped to accomplish by dragging Umbridge into the Forbidden Forest came up again. And it was clear from the comments that people didn’t remember precisely what canon told us about Hermione’s knowledge of the centaurs. Specifically, everyone was forgetting that she’d encountered the centaurs in Hagrid’s company less than a week before she led Madam Umbridge out to meet them.
When Hagrid took her and Harry to be introduced to his little brother (OotP 30).
So in evaluating what Hermione might have expected to happen, we need first to look at what she learned from the previous encounter. Let’s look at it.
Before they entered the Forest, we read:
( Hagrid )