|Title||Vongola's Best Weapon Tuner|
|Age||40s - 50s|
|Manga Debut||Chapter 52|
|Anime Debut||Episode 39|
Giannichi is Giannini's father and the Vongola Famiglia's best weapon tuner. He is famous for his ability to "awaken" a weapon. At the moment, he is working in Italy. According to Reborn, weapon tuning and upgrading for the Vongola Famiglia has always been Giannichi's family's job. He and Reborn are close friends, and Giannini stated that Reborn had always been a close friend of he and his father.
Giannichi is mentioned by Reborn to be the father of Giannini, who came to Japan to upgrade their weapons though failing. Reborn later states that Giannichi was the best weapon tuner, Giannini also stating that he admired his father Giannichi and aspired to become a good weapons tuner just like him.