Dementors are terrifying creatures with the ability to "kiss" you and take out your what?

Dementors are soulless creatures that feed on human happiness and can perform their signature attack called the Dementors Kiss. This involves sucking out a victims soul through their mouth, leaving the victim alive but completely empty - worse than dead, as Professor Lupin explains to Harry. The heart continues beating, but the person loses all consciousness, memory, and sense of self.