Name(s):Reborn "Elder PaoPao,Reboyama,Vongolasky,Professor Borin"
Title: Sun Arcobaleno, Home Tutor Hitman
Gender: Male
Age: 1 (as Arcobaleno)
Birthday: 13 October
Height: 40 cm
Weight: 3.7 kg
Weapon: Leon; the shapeshifting Lizard
Flame: Sun
Reborn is the baby Home Tutor of Tsunayoshi Sawada, and whenever he greets someone, he says "Ciaossu", a casual male greeting that combines Ciao and Ossu. He wears a black fedora with an orange stripe running across the sides of the cone. He has black eyes and wears an all black suit with black boots and a purple dress shirt underneath.
He is always seen with his pet chameleon Leon on the brim of his hat, along with his yellow Arcobaleno pacifier.
Out of all Arcobalenos, Reborn is said to be the strongest.
Name(s):Lambo"Stupid Cow,Crybaby Lambo,Bomber Head Lambo,Aho Ushi"
Age: 5, 15, 25 (adult)
Gender: Male
Date of Birth: May 28
Nationality: Japanese/Italian
Blood Type: A
Favorite Food: Grapes and Candies
Mafia: Vongola/Bovino
Occupation: Assassin
Vongola Ring: Ring of Thunder
Box Weapon: Gyuudon (Vongola Lightning Bull aka Beef Bowl)
Lambo is a hitman assassin from Italy's Bovino family. He is also the self proclaimed rival of Reborn.
His main choice of weapons are hand grenades and horns, and his future dream is to rule the world. Lambo dresses in a cow suit complete with a tail, and has a huge afro with horns on the sides of his head which gives him the appearance of a bison. He's a pretty good resistance against lightning!
Although he claims to be the "great Lambo-san", Lambo is a total crybaby. Because of that he occasionally uses the Ten Year Bazooka to switch places with his 10 year older alternative. But, it is seen that even 10 years older Lambo is still a a complete Crybaby and unable to beat Reborn. Though if he uses the 10 year bazooka again, he becomes very powerful.

Name(s):Chrome"Nagi"Dokuro
Title: Vongola Mist Guardian
Date of Birth: December 5
Age: 13 years old, 23 in the Future (Taken from the Databook)
Blood Type: Unknown
Height: 152cm
Weight: 41kg
Weapon: Trident, Demon Spade Evil Lens, Mist Earing ver. X
Vongola Ring: Ring of Mist
Box Weapon: Gufo di Nebbia ver. Vongola (Mukuro)
A young girl who wears a Kokuyo school uniform and shares the same 'pineapple' hairstyle as Mukuro.
From what her parents talked about, she is a girl known as Nagi and lived a non-social life which made it hard for people to communicate with her. One day after rescuing a cat, she was badly injured in a car accident which lead her to lose her right eye and some of her organs. The only way to save her life would be to have someone with the same blood type to transfer their organs to her. She didn't care whether she lived or not and her parents refused the offer anyway. But after her meeting with Mukuro Rokudo, he allowed her to live by creating illusory organs. And because of that she never opens up to anyone except Mukuro.
She is a nice, innocent girl but can be very shy at times and gets confused when someone is kind to her since she had never imagined that her existence could be accepted by people. Despite having an introverted personality, she kisses Tsuna on the cheek during their first meeting and calls him "boss". She tends to lean on Mukuro for help, usually, Chrome is in control of her body, but if she is in an extremely dangerous situation, her body is surrounded by mist and Mukuro takes control, along with the body changing to Mukuro's appearance; However, in the Future, she becomes determined to get stronger to help the people who are dear to her.
The Japanese rōmaji of her name, Kurōmu Dokuro, is an anagram of Mukuro Rokudo.
Name(s):Hayato"Smokin' Bomb Hayato,Hurricane Bomb Hayato,Ahodera,Octopus Head"Gokudera.
Age: 13-15; 23-25Gender: Male
Date of birth: September 9
Nationality: Japanese/Italian
Known relatives: Bianchi (Half-Sister), mother (deceased), father
School: Namimori Junior High
Grade: 1st year, 2nd year (later in the series)
Rings: Vongola Ring of Storm, 4 Rings from Sistema C.A.I.
Box Weapon: Leopardo di Tempesta ver. Vongola (Uri)
Gokudera was born in Italy and is 3/4 Italian and 1/4 (mother) Japanese. His blood type is B, is 168 cm tall, weighs 54kg and his hair is silver. His future dream is to become the Tsuna's right-hand man. He has an ability to play the piano. He dislikes people that are older than him, Bianchi and Lambo. Gokudera is also a chain smoker, but they remove this in the anime adaptation.
At school, Hayato is adored by many of the female classmates who view him as the "rebellious badboy." During Valentine's Day, a large group of females constantly followed him around trying to give him chocolate, although Hayato seemed to be more annoyed than flattered by this. Despite his image of a rebel, Hayato excels in his schoolwork and aces all his tests, much to the surprise of Tsuna. This is probably due to his rich upbringing, suggesting that he probably had a multitude of private tutors when he was young. He idolizes Tsuna greatly and considers himself to be Tsuna's right-hand man.
Due to a traumatic childhood experience, every time he sees the face of his older sister, Bianchi, he becomes sick, sometimes even falling unconscious. Oddly enough, he is immune to his sister when she happens to be wearing something that covers part of her face (i.e. glasses or goggles).
When he was younger, he was a talented pianist. However, he soon grew tired of playing after his 'trauma', and instead, decided to join the Mafia. Unfortunately, since he was considered to be a mere pianist, no one wanted to accept him into their family; the fact that he was an oriental half-breed lessened his chances of finding a willing Mafia family to take him in. To become stronger, he sought advice from Dr. Shamal, who, at the time, was working for his family. Hayato seemed to have looked up to Shamal, to the point that Shamal believed Hayato to have copied his hairstyle, and even wanted to learn his assassination technique, the Trident Mosquito. Instead, Shamal taught him how to use dynamites, which caused Hayato's fascination with explosives, eventually choosing them as his main weapons.
In the future arc, more was revealed of Gokudera's past. He and Bianchi are actually half siblings, born by different mothers. Bianchi's mother was married to their father but Gokudera's was a woman with whom he had an affair. Gokudera's mother was a young, beautiful woman and a very talented pianist, whom their father fell in love with at first sight. Not long after, they became involved and the woman bore a child. However, in the mafia, illegitimate children are not tolerated, and everyone was told that Gokudera Hayato was actually from the same mother as Bianchi.
His real mother was allowed to see him three times a year until he was three, when she was killed after driving off a cliff on her way to see her son. It was probably not an accident, because, as Reborn says, "It slid off the road at an impossible location. It's been said that there weren't even tire marks. It was instant death." Suicide was considered, but she had been looking forward to that day and had even brought a present for the young Gokudera. Gokudera himself was unaware of what had happened until he was eight. He had overheard some servants gossiping and fled the mansion the day following.

Name(s):Kyoya"Kyo-san,Strongest Vongola Guardian"Hibari.
Age: 16 - 26 (10 years later)
Gender: Male
Date of Birth: May 5 (Children's Day in Japan)
Nationality: Japanese
Height: 169 cm
Weight: 58 kg
School: Namimori Junior High
Grade: 3rd year (chapters 16 - 44), 3rd year (chapters 45 - )
Affiliation: Disciplinary Committee, The Foundation (10 years later)
Vongola Ring: Ring of Cloud
Box Animal: Roll (Version Vongola Box)
Hibari is the leader of the Discipline Committee, or Prefects, who all happen to be a group of delinquents loyal to Hibari. Like his subordinates, he too is a violent delinquent who uses his status to harass other students. However, he prefers to be alone and cares little for his subordinates. If he is amongst a crowd, he tends to play violent "games" with rules like "I'll kill anyone who wakes me up when I'm sleeping," and as mentioned, the loser often has to pay the price with his life.
His catchphrase is "I'll bite you to death", which he says to everyone who he is ready to fight. In one comic scene, Ryohei misunderstands it and imagines Hibari swallowing Gola Moska's head. He also likes saying "wao", and when he fights weak opponents, he tends to taunt them by calling them a 'herbivore'. He likes eating Japanese food and hamburgers.
Hibari may be a violent and cruel person at times, but he is very proud of his school, and is apparently the only person who likes their school's song, even using it as his ringtone. He has also been shown to have an affinity for birds; he adopts one of the avian followers of Kokuyo assassin Birds' and trained it to chirp his school's song. The bird (subsequently nicknamed "Hibird" due to its connection to Hibari) becomes attached to Hibari, so much so that it still remains with Hibari nine years and ten months into the future.
His attitude and abilities have gained the attention of Reborn, who sees him as a potential candidate for Tsuna's family. However, Hibari likes nothing more than to kill those who are in his way or people that are crowding.

Name(s):Mukuro"Pineapple Head,Pineapple Fairy-san"Rokudo
Age: 15; 25
Gender: Male
Date of birth: June 9
Nationality: Italian
School: Kokuyo Junior High
Affiliation: Kokuyo Junior High Gang
Vongola Ring: Ring of Mist
Mukuro Rokudo is one of the main characters of Reborn! and is also the first season's primary villain.
Portrayed as the series' first primary antagonist, Mukuro Rokudo is introduced as a 15-year-old Mafia criminal who is the leader of the Kokuyo Gang, which consists of heinous criminals whom have recently escaped from prison. However, later on in the series, he takes on a more supportive role for the series' main characters, becoming somewhat of an ally rather than an enemy, though he prefers to not consider himself as one of their allies.
Despite often being shown with a playful smile, Mukuro is seemingly apathetic to the suffering of others. Appearing as the series' first antagonist, Mukuro is not averse to disposing of those who get in his way, and is not easily intimidated, usually speaking to others in a very direct and arrogant manner. He cares little for others, and simply considers people to be "toys" or "tools" he can sacrifice in order to get to what he wants.
Mukuro is implied to have a strong dislike for the entire Mafia underground, due in part to the experimentations he suffered as a child at the hands of the Estraneo Mafia family. When Mukuro killed his captors, he offered Chikusa and Ken, who were also victims of experimentation, a chance to join him in his quest to destroy the world. However, not only does he want to take revenge on the Mafia by destroying it, he also wants to cleanse the world of its filth by invoking universal suffering through a world war. Even after becoming the Vongola's Mist Guardian, Mukuro still claims to no longer be part of the Mafia, having been exiled from it, and continues to view the organization with great contempt.

Name(s):Ryohei"Turf Head"Sasagawa.
Age: 15, 25 (future self)
Gender: Male
Date of birth: August 26
Nationality: Japanese
Known relatives: Kyoko Sasagawa (sister)
School: Namimori Junior High
Grade: 2nd year, 3rd year (later in the series)
Vongola Ring: Ring of Sun
Box Weapon: Kangaryuu/Canguro del Sereno ver. Vongola
Sasagawa Ryohei is obsessed with boxing and is one of the oldest Vongola Ring Guardians. He is the older brother of Kyoko Sasagawa, a girl that Tsuna has a crush on. Sometime prior to current story time, when Kyoko and Ryohei still were in Primary School, he was lured by some High School students, and then beaten up, receiving the scar on his left temple in the process.
Ryohei's main motto of life is "Extreme" which he applies to whatever he does. He was once shot with the Dying Will bullet by Reborn and it drew every atom of his power from body because he is always in Dying Will mode.
It is mentioned that Ryohei was born with incredibly strong muscles, thus possessing greater strength than the average human being. But, he isn't able to use the full extent of his power, unless he has tremendous motivation, like being in a life or death situation, or fighting for Kyoko's safety.

Name(s):Tsunayoshi"Tsuna,Tsu-kun,10th,Juudaime,No Good Tsuna,Vongola Decimo,Boss"Sawada.
Age: 14
Gender: Male
Date of birth: October 14
Nationality: Japanese {mothers side}, Italian {fathers side}
Known relatives: Nana Sawada (mother), Iemitsu Sawada (father), Giotto (Deceased, Great-Great-Great Grandfather)
School: Namimori Junior High
Grade: 1st year, 2nd year (later in the series)
Vongola Ring: Ring of Sky
Box Weapon: Leone di Cieli Version Vongola
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.

Name(s):Takeshi"Baseball Idiot,Yamamo-chan"Yamamoto.
Age: 15, 25 (future self)
Gender: Male
Height: 173 cm, 185 cm (future self)
Weight: 63 kg
Date of birth: April 24
Nationality: Japanese
Known relatives: Tsuyoshi Yamamoto (father)
School: Namimori Junior High
Grade: 1st year, 2nd year (later in the series)
Vongola Ring: Ring of Rain
Box Weapon: Rondine di Pioggia ver. Vongola (Kojirou), Cane di Pioggia (Jirou)
Favorite Food: Sushi
Favorite Drink: Milk
Takeshi is cheerful boy from Tsuna's class whose dream is to become professional baseball player. He spends most of his time either practicing or helping out in his father's sushi restaurant.
Introduced as playful and happy guy, Yamamoto is not hard to become friend with. He succeeded in making some of the series's angriest characters his friends or comrades, such as Hibari Kyoya or Superbi Squalo.
Takeshi is athletic built, tall, with dark, almost black hair and brown eyes. A smile is almost always present on his face, and as he is very kind to people, he soon became one of the Namimori High School's idols, being very loved by girls in the school.
Although he sees almost everything as a game, Takeshi can be serious when the time is right.
In the series, it's shown that he is willing to put his life on the line for friends and comrades, and Reborn noted that out of all people from Vongola Family, Yamamoto Takeshi probably has the most talent for being an assassin.