Chitauri

The Chitauri are a group of bad guys from a movie called The Avengers. They come from a different planet and look scary and mean. They were sent by another bad guy named Thanos to try to take over Earth. But don't worry, the good guys like Iron Man and Captain America worked together to stop them and save the planet. Think of them like bullies who can't be on Earth because they try to hurt people, and the superheroes needed to stop them.