Is there anything he can do about or with the dementor other than destroy it, which is far too obvious?
He might be able to do something fancy the same way he commanded a dozen of them to “Turn and go and do not speak of this to anyone” in TSPE. Maybe silently tell it to spread the word to its brethren that no Dementor is to go near Hermione? Which still leaves her stuck in a cold metal box for ten years, so it doesn’t seem to help much.
He might be able to do something fancy the same way he commanded a dozen of them to “Turn and go and do not speak of this to anyone” in TSPE. Maybe silently tell it to spread the word to its brethren that no Dementor is to go near Hermione? Which still leaves her stuck in a cold metal box for ten years, so it doesn’t seem to help much.
Maybe. On the other hand, he’s in a hall of people who all strongly believe that Dementors would never do any such thing and will obey their commands.
So you’re going with Harry’s initial idea, that Dementors are controlled by expectations? If that’s the case, then yeah, it probably won’t work.