Hime-chan's Ribbon

Erika, princess of the Magic Kingdom, arrives on Earth to locate a human girl who looks identical to her. She finds Himeko Nonohara, a fiercely tomboyish girl, and entrusts her with a magical hair ribbon-a creation meant to prove Erika’s worth as the kingdom’s future ruler. The ribbon lets Himeko transform into anyone she sees, and she must test its power to determine if it meets the kingdom’s standards. As Himeko navigates these strange new abilities, she grows closer to Daichi, the boy who uncovers her secret.