Skilled in casting illusions as well as mind control, he attempts to take his revenge on the Mafia by taking over Tsuna's body and using him to wreak havoc. Not long after, he, along with his two subordinates, came to Japan, enrolled in Kokuyo Junior High, and started the Kokuyo Gang, which consists of heinous criminals who have recently escaped from prison. Mukuro Rokudo ( 六道 骸, Rokudō Mukuro) is a 15-year-old Mafia criminal who escaped from an Italian prison, which held some of the most dangerous Mafia criminals, before he was to be executed. However, things started to get worse once an Arcobaleno with a clear pacifier, Bermuda von Veckenschtein appears with his team and participate the Representative Battle in order to get his revenge on Checker Face at the cost of the Arcobaleno's lives. Later, Tsuna and the others participate in Representative Battle of the Rainbow under request from the Arcobaleno with the winner will be able to have his or her curse removed. After returning from the future, they have to fight against an allied Family of Vongola since first generation who's seeking revenge to Vongola, Simon Family who turned out to be manipulated by Vongola Primo's Mist Guardian, Demon Spade who intended to rebuild the Vongola that he desire. When some of the characters are later transported into an alternate future, nine years and ten months later, they have to adapt to a world where every Vongola member, as well as their allies, is being hunted down by a powerful rival family, the Millefiore. Enemies such as the Kokuyo Gang, a group of Mafia criminals, and The Varia, an elite team of assassins, prove to be formidable challenges for Tsuna and his comrades. They eventually attract attention from those who want to annihilate the future boss of the Vongola Family. Reborn, the titular character and infant hitman, is sent to train him, and slowly recruits members into Tsuna's own Mafia family. The story centers on middle school student Tsunayoshi "Tsuna" Sawada, who finds out that he is the heir to the Vongola crime family.
However, their connection to an Italian Mafia family results in a majority of other characters introduced being mainly of Italian descent, including most of its antagonists. Set in a fictional town called Namimori in modern Japan, the series' main protagonists are of Japanese descent. The antagonists of the Reborn! anime and manga series, known in Japan as Katekyō Hitman Reborn!, are created by Akira Amano.