Luca Metallica is the protagonist of the anime series 'Majo to Hyakkihei' (The Witch and the Hundred Knight). She is a powerful witch with an insatiable thirst for knowledge and power. Luca is known for her fiery personality and determination to become the most powerful witch in the world. She commands the Hundred Knight, a mysterious and powerful creature, to aid her in her quest. Throughout the series, Luca's adventures and struggles reveal her complex nature, as she grapples with her ambitions and the consequences of her actions.