Queen Chrysalis

Queen Chrysalis is a female changeling and an antagonist of My Little Pony: Friendship is Magic. She is the changeling queen who sought to take over Canterlot and defeat Princess Celestia. Queen Chrysalis is the second Equestrian threat posed to Earth after Discord.

Earth to Pony
10 years after Joey used the Elements of Harmony to defeat the evil humanoid version of Discord, Queen Chrysalis somehow managed to transport herself and a group of changelings to Earth. There, she planned to gain control of the portal connecting Earth and Equestria and gain the Elements of Harmony to invade Earth with an army of changelings.