Belle Poupée no Supadari Konyaku: "Konomi ja Nai" to Iwareta Ningyou Hime, Gaman wo Yametara Ouji ga Deredere ni Natta. Jitsu ni Ui!

The Duchess Laetitia is nicknamed “Belle Poupée,” the beautiful doll. Despite her fragile appearance, she is actually a dashing heroine who charms both men and women alike! With a magical artifact, she can transform herself into the powerful warrior known as the “Imperious Ice Dragon,” but her true...

Source: MyAnimeList