Star Butterfly is the main protagonist of the Disney animated series Star vs. the Forces of Evil, a magical princess from the dimension of Mewni who is sent to Earth to learn to use her royal magic wand responsibly, living with the Diaz family and her best friend Marco Diaz. She is known for her energetic, rebellious, and optimistic personality, her signature heart-shaped cheek marks, and her journey of growing from a childish princess to a mature queen.