
He is similar to Tsuna in many aspects, especially their soft nature that Daemon Spade once had commented on. He also has a strong sense of justice and actively pursuing of what he believes is right for the people, which is why he formed the Vongola Family. He is shown to be a calm and collected leader that cares for his friends and family and is willing to protect them from harm. Their Guardians are quite similar as well: Yamamoto, Hibari, Mukuro, Lambo, Gokudera, and Ryohei have already been shown to be very much like their predecessors in appearance, weapon of choice, and personality. Tsuna has repeatedly been shown to be very much like him, as they have the same weapon and techniques (including the Zero Point Breakthrough), similar appearances, and equally unorthodox Families (the First Family included kings, military men, rival Mafiosos, and religious people).

He is the great-great-great grandfather of Tsuna. After his retirement, he moved to Japan and started a Family, making Tsuna his descendant.

He is also the creator of the Zero Point Breakthrough. Giotto is the Founder of the Vongola Famiglia, and thus, its First Boss.
