Amelie's husband. While he doesn't seem to mind traveling alongside his wife, he's seemingly more interested in reading about the various sights and happenings around Neo-Venezia. He has a slight temper, and at first heavily underestimated the work it took to become a Prima. This, coupled with his vocal displeasure about spending the full day on a gondola is what earned them the opportunity to witness the girls' training later on.
Tsuna is set to become the tenth generation boss of the Vongola family. In school, Tsuna has been given the harsh nickname of "No Good Tsuna", as he is very clumsy, gets low marks in school and is somewhat of a pushover. Although he is the tenth generation Vongola boss, Tsuna is unwilling to take part in anything that has to do with the Mafia. He always denies the fact that he is a future Mafia boss and tries to avoid anyone involved with the Mafia. In the Future arc he states that he would rather destroy the Vongola family than accept its bloody history. Tsuna is often surprised and horrified (for a comedic effect) at Reborn's and other mafiosos' actions. Later, even though he still wants nothing to do with the Mafia, he is grateful for the friends he has made since meeting Reborn. He cares a lot for his new 'family' and would put himself in the way of danger in order to protect them. There have been many parallels that link Tsuna with the first boss and founder of the Vongola family, Giotto. Both of their personalities are likely to be very similar as it has been shown that they have similar goals and ways of standards.
He's a worker at Gamers, He is only in the anime in one episode for a couple of seconds
Giovanni is the leader of the Wolf Pack gang. He is fair when it comes to fighting. This was proven when Giovanni and his companions fought with the Black Brothers. Before their fight began, he told everybody that using any kind of weapon is not allowed. But Tachioni, one of the members of the Wolf Pack, disobeyed. He drew a blade and tried to kill Romeo. Because of this, Giovanni accepted the defeat of the Wolf Pack gang in their fight against the Black Brothers. Later on in the series, Giovanni and his companions became more supportive for the Black Brothers. In the last episode of the anime, Giovanni and the rest of the members of the Wolf Pack gang decided to make peace with the Black Brothers.
Yasujiro is a police inspector and Miyuki Kashima's father.
Rakuta is the older brother among the twins. He is very calm and calculating and always keeps his cool. He can predict events what will happen in the near future. From Wikipedia.