Lambo (ランボ, Ranbo?), Voiced by: Junko Takeuchi (child), Kenjirou Tsuda (adult)
Character
thumb|200px|left|Video proving Lambo's foolishness and his crybaby-ness Lambo is a 5-year-old assassin affiliated with the Bovino ("Bovino" means "cow" in Italian) Famiglia. He was born in Italy on May 20 and has a blood type of A. His main choice of weapons are hand grenades, 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 comes to Japan to kill Reborn, so he can prove that he is worthy of becoming his own family's boss. However, he is a complete crybaby, and is no match for Reborn.
History
For the most part of the Daily Life Arc, Lambo tries several times to kill Reborn through without much success though at the same time befriending Haru and is soon a common stable around the Sawada household much to Tsuna's annoyance.
Varia Arc During the Vongola Tournament, Lambo is chosen to be the holder of the Ring of Thunder because of his Electrico Cuoio (Electric Skin), which allows him to channel electricity harmlessly through his body. During his battle with Levi A Than, he is shown to be able to use the Ten-Year Bazooka twice in a row, switching with his 25-year-old self. As his 25-year-old self, he can summon stronger red lightning, and is capable of projecting it as a single 'blade' of energy in an advanced Electrico Cornuta. He also possesses Perfect Electrico Cuoio, which allows him to be completely resistant to all electrical attacks. He is also able to release it into the ground or towards an opponent as a new attack called Electrico Reverse. However, he ends up losing the fight due to the short time-limit of the bazooka's effects. Just as he about to be finished, Tsuna save him but end up losing his ring along with Lambo as a result for doing so. Lambo remain in critical condition afterward but that isn't enough to stop him from being (forcibly) participating in the sky battle. Levi A Than seek to finish him off but Gokudera ends up saving him.
Future Arc In the future, 15-year-old Lambo is shown to be protecting adult Haru and Kyoko with I-Pin. However, they are soon replaced in the future time by their past selves. He usually seen around Haru, Kokoyo, and I-Pin in the underground Vongola base for much of the arc afterward. He is then taken to the Melone base with Chrome and I-pin. He is the only guardian who does not train to master the rings. After allying themselves with Irie and receiving the Lightning Vongola Box from the machine at the Melone Base, he return with the others to train.
Abilities
Lambo is shown to be the only guardian not training to master the rings in the future.He possesses the Ten-Year Bazooka, which switches the target with their own self from ten years later for five minutes. Every time Lambo loses his cool, he uses it on himself, switching with his 15-year-old self. In this form, he ditches his cow suit for a casual suit and cow-print shirt. Although this "Adult Lambo" is shown to be handsome, he remains a crybaby, and is often heard saying things that imply his future involves cleaning toilets. He also begins many sentences with "Yare yare" (loosely translated as "Oh my!"; "Oh gosh!" is Viz's translation), and often has one eye closed. He is also able to summon lightning, which he can channel into his horns. He can then charge his opponent in an attack called Electrico Cornuta, though he often misses his opponent. However, whenever Bianchi sees the "Adult Lambo", she starts trying to kill him because he looks exactly like her ex-boyfriend, Romeo.
Adult Lambo
As his 25-year-old self, he can summon stronger red lightning, and is capable of projecting it as a single 'blade' of energy in an advanced Electrico Cornuta. He also possesses Perfect Electrico Cuoio, which allows him to be completely resistant to all electrical attacks. He is also able to release it into the ground or towards an opponent as a new attack called Electrico Reverse. In the future, Lambo is technically the second person to open his Vongola Box, but his is the first to have it's true form revealed.
Due to the unstable nature of the past affecting the future, the older Lambo will only know of certain events after the adjustment in the past. At one point, he does not know of the Vongola Rings, but during the tournament, the future Lambo has changed and knows of the tournament and the rings. In some occasions, when the bazooka becomes unstable or damaged, the malfunction can cause different effects.
Lambo's Vongola Box when opened