Duke

The familiar who serves Chocolat Meilleure is a frog with red and black stripes, characterized by a lazy and unreliable personality. When speaking, he habitually ends his sentences with "...kero." In terms of human age, he is equivalent to a 30-year-old. His hobby is dancing, and he dreams of becoming an idol singer in the future. Pierre occasionally makes ambiguous remarks to him, saying things like, "You are...," hinting at a mysterious identity.

In truth, his real identity is Poivre Meilleure, a highly skilled magician who is the younger brother of Cinnamon Meilleure, making him Chocolat Meilleure's uncle. In the anime, Poivre is not mentioned, and although he appears once in human form, it is not revealed at that time that he is Duke. When in human form, his usually clumsy personality disappears, and he often delivers sharp retorts to Chocolat Meilleure.