Giotto is the founder of the Vongola Famiglia; thus, its first Boss. He is also the creator of the Zero Point Breakthrough technique. After his retirement, he moved to Japan and started a family. He is the paternal great-great-great grandfather of Tsunayoshi Sawada, who has repeatedly been shown to be similar to him, as they have the same weapon and techniques (including the Zero Point Breakthrough), almost identical appearances, and equally unorthodox Famiglias (the First Famiglia included aristocrats, military men, rival mafiosos and religious people). Their Guardians are quite similar as well: Yamamoto, Hibari, Mukuro, Lambo, Gokudera, and Ryohei have already been shown to be very much like their first predecessors in appearance, weapon of choice, and personality.