Adorable but dark little creatures
The Shadow Heartless are the main enemies of the heroes in the Kingdom Hearts video game series. They represent the evil side of people. When someone is attacked by a Heartless or their own heart succumbs to darkness, a new Heartless is created. It is because of an attack by these creatures that Sora, the hero of the game, gets separated from his friends and finds himself asking for help from the Disney characters he comes across to find them.