Dian  

, ディアン

In the first season of Jewelpet, Dian serves as the primary antagonist. He's a Gray Maine Coon cat who possesses the ability to harness forbidden dark magic in its most potent form called "Obsidian Eyes Power." Along with Diana, his partner in Jewelpet Tinkle, he wears distinctive accessories such as a black round orb necklace and a red and black cape. Dian's birthday falls on January 20th, and his name is derived from the mineral obsidian.