Dementor

Abilities
Dementors suck all the happiness and hope out of a person. They are completely blind, but they can sense human feelings.

Dementors guard Azkaban, the wizard prison. If anyone escapes from azkaban-and if someone or the dementor finds him/her-the punishment is a dementor’s kiss. A dementor’s Kiss is when a dementor clamps its jaws around the victims mouth, and sucks their should out. It is very disgusting and dangerous. It is much more worse than death.

Dementors don’t walk, they glide! As (I dont know who) says, they glide, and not walk.