Thread:Looperreallyreallysucks/@comment-39213635-20190423191249/@comment-39213635-20190428235802

You know, I think I know what happen to a person when his/her soul is sucked by the Dementor. It's really simple: The soul would be trapped inside the Dementor. Remember that a mere presence of a Dementor from distance is already enough to cause people's worst thoughts and despair. And since the soul is now inside the Dementor, that would be even 10000000000 times worse, while they can't die as long as they're still trapped inside the Dementor. Meanwhile, their body would still be active, in a vegetable state, so it's pretty much fits "a fate worse than death". I know that Lupin said "soul is gone forever... lost", but "lost/gone" could simply mean that it's absorbed and a human can't take it back. Plus Lupin isn't omniscient, no one knows what happens when the soul is absorbed by the Dementors, except for the victims themselves, who don't have enough self-aware left to tell. So how can the souls escape? It's simple, kill the Dementors. Of course, that's veeeeery hard and apparently it's impossible for a mere human to do so.

TLDR: The souls are trapped inside the Dementors while the bodies stay in vegetable state, thus the souls always have to live with worst thoughts and despair. Only when the Dementors are destroyed that the souls would be free.