Gelaro is the main antagonist of Katekyō Hitman Reborn! DS Fate of Heat III - Yuki no Shugosha Raishuu! and the Vongola Snow Guardian. He is the tenth Boss of the Bertesca Famiglia, an allied Famiglia to the Vongola since the times of both Famiglias' respective first generations, and is in possession of the Vongola Snow Ring. His territory is the Catafalco Island in the Mediterranean.