Vongola Style School Trip! Reborn (リボーン, Ribōn) is the infant home tutor of Tsuna and the world's strongest hitman. Before he received the Arcobaleno Curse, he greeted people with the word "Chaos". However, he says "Ciaossu" while he is in his cursed form due to his undeveloped vocal cords as a two-year-old. Italian and Japanese greetings "Ciao" and "Ossu". Adult Reborn in the anime. He wears a black fedora with a thick orange stripe running across the sides of the cone. He has black eyes and wears an all-black suit with black boots and a red long sleeved polo with a blue necktie underneath. His adult form, however, wears a yellow long sleeved polo. Reborn has also worn many various costumes that vary in design and creativity. He is always seen with his pet chameleon Leon on the brim of his hat along with his Sun Arcobaleno Pacifier. Among all the Arcobaleno, he is said to be the strongest. It was revealed in a flashback that Reborn initially showed anger towards the Arcobaleno curse; however, after a period of exile, he came to accept it, asking Shamal to "erase" his old self.
As an Arcobaleno, he remains fairly calm through any situation and always putting a straight face, even in his "fights" against Colonnello. He also likes to occasionally tease his students, much to both Dino's and Tsuna's dismay. He did, however, admit to have snapped when Timoteo was revealed to be in Gola Mosca during the Varia Arc, and was also shown to be enraged when he could only helplessly watch as Tsuna was being beaten up by Daemon. Reborn mostly takes a mentoring back seat in the arcs, rather than the direct fighting; however, he can be credited with helping Tsuna achieve much higher levels and gain new, more powerful attacks. Reborn is introduced and he is shown wearing many costumes and appearing in his many hideouts. He is a known celebrity at Mafia Land. Before he learns of the seriousness of the attacks, Reborn, along with Nana encouraging Tsuna to learn how to defend himself. But when he and Tsuna visit the hospital after Ryohei falls prey to the attacks, he discovers the watch. When Leon's tail falls off, the severity hits him. He reads Tsuna the letter he received from the Ninth, and opts to gather a group to do battle with Mukuro's gang. Bianchi, Yamamoto, and Gokudera join Reborn and Tsuna as they begin their offensive. During Takeshi's bout with Ken, he kicks Tsuna into the Botanical Dome because he expressed concern over Takeshi.
He and Takeshi simultaneously figure out and reveal the trick of the Steel Serpent Ball.
He helps the two out of the hole after Takeshi wins the fight and accompanies the group to a rest area, where he sleeps through the encounters with MM Birds. When Reborn awakens, Tsuna runs off to go and pursue Fuuta, and the rest of the group stays behind to take on the next killer, who turns out to be the Fake Mukuro. When Gokudera is temporarily incapacitated by Shamal's Trident Mosquito side effects, he watches as Yamamoto takes on the Fake Mukuro. He and Takeshi simultaneously figure out and reveal the trick of the Steel Serpent Ball. But, it wasn't enough for his future pupil to win. As Bianchi steps to the plate to fight next, and is nearly pulverized, Reborn shoots Tsuna with the final Dying Will Bullet just before he catches the weapon. Reborn looks on as Tsuna takes the win, and as Lancia reveals that Mukuro is actually still up ahead. Reborn is forced to condone leaving Gokudera behind to take on Chikusa and supplies Tsuna with the whip Dino gave him. He mainly observes as Tsuna frees Fuuta from possession and gains his new X-Gloves to battle with Mukuro, only intervening when Tsuna panics in the midst of the fight, and he has to talk some sense into him. Reborn, during the down time between Ring Battles, trains Tsuna on how to use the Dying Will Zero Point Breakthrough in order to take on and defeat Xanxus.
However, when Hibari returns from training after Hayato's Storm Ring Battle, to bite everyone-Varia and Tsuna's Family- to death, Reborn placates him by promising that he may be able to battle Mukuro again, which greatly pleases Hibari. For the remainder of the Arc, Reborn has a mainly static role of training and commenting. He lastly shoots Tsuna at the start of the fight when Xanxus tries to gain a cheap shot before the match starts and watches as Tsuna's Family proves victorious in the Sky Battle. Reborn is the first to be transported to the Future and trapped there. It is not yet revealed how he found his way to the Vongola Headquarters, but he is next seen greeting Tsuna and Gokudera as they arrive there with Lal Mirch, though he has to wear a special suit to keep from being killed by the anti Tri- ni-set radiation that Byakuran is pumping into the atmosphere. The anti-Tri-ni-set radiation affects the Arcobaleno severely, paralyzing their movement and killing them slowly, but it does not seem to have an effect on normal people.
Reborn reveals to Tsuna that he needs to gather all seven of his guardians to do battle with Byakuran's forces. Reborn doesn't venture out of the base at all during this plotline due to the radiation. Reborn appears after Tsuna is captured by Spanner as a hologram projected by Tsuna's headphones and witness to Spanner instructing Tsuna on how to use the contacts to perfect his X-Burner. He remains with Tsuna for the rest of the invasion, and gets Giannini to program a holographic distraction during Tsuna's fight with Genkishi. When Shoichi Irie reveals that he is an ally of the Vongola, Reborn believes him, mostly because he answered the questions that Reborn had being thinking about since he was sent to the Future. As Tsuna and his Family are sent back to the past, Reborn tells them the few Abilities and characteristics of the Arcobaleno. He also remembers that the current Sky Arcobaleno is missing, which may become a predicament for Tsuna in the Future Trials.
Tsuna finally accepts this and enters Hyper Dying Will Mode and fights Reborn.
He also reminded Tsuna that he is also an Arcobaleno, in which he says that he would not hold back during the Trial. During Reborn's Arcobaleno Trial, he informs Tsuna that his Trial was a seven-on-one, all-out battle with him, and that all six of the Guardians, including Lambo, were to participate. He knocks out Tsuna and takes down Hibari, Chrome, Ryohei, Gokudera, and Yamamoto. When Tsuna finally comes to, the sleeping Lambo is the only one who was in a good condition. Tsuna at first does not want to fight Reborn, but Reborn tells him that he's still "too soft" and that his fallen comrades are his responsibility. Tsuna finally accepts this and enters Hyper Dying Will Mode and fights Reborn. He gets captured by Verde, along with all the other Arcobaleno besides Aria, using a variation of anti Tri-Ni-Set waves, which only paralyzes them, as opposed to outright killing them. After Verde's trial, he was asked for a second chance at his trial by Tsuna, but he said that it wasn't necessary. He states that they completed it in their fight with Verde. To prepare for "Choice," the war game that Byakuran is making the Vongola Guardians play, Reborn asks Shoichi to explain the rules. While he finds the game tasteless, he has great faith that the technicians will come up with solutions for the problems they will be facing. One of their solutions was to make the Guardians ride Motorbikes for extra mobility.
When explaining to Tsuna how to ride, he instructs Tsuna to pop the clutch without Tsuna realizing that it was wrong. Reborn's reasoning is that Tsuna should get the worst parts over first that is his tutoring method. When Dino arrives at the Vongola Headquarters and assigns the Guardians their tutors, Reborn assumes the role of "Tutor Fairy," mostly likely only so he can discipline Dino if he makes any mistakes. Reborn is present during Yamamoto and Hibari joining the group in the moments before Choice begins. He sees them all unleashed their Vongola Boxes and generates twice the amount of FVs needed to transport them- a whopping 10 million. He is engulfed in a beam of light along with everyone else present. He wakes up in the Lightning Field that Tsuna selected, and listens as Byakuran explains the rules of Choice more clearly. Reborn, along with the rest of those chosen to sit out of the first battle, relocate to the Vongola Audience Stalls to watch the battle of Tsuna, Gokudera, Yamamoto, Shoichi, and Spanner for the Vongola versus Kikyo, Saru, Torikabuto, and Daisy for the Millefiore under the Target Rule. Later, he protects Yuni from Byakuran by shooting him, saying that if he lays a finger on the Arcobaleno Boss, he won't sit back and watch. Seeing that Tsuna and the others need to become stronger, Reborn arranges to have them sent back to the past.
He goes to the amusement park with Lambo, Tsuna, Gokudera, and Yamamoto.
While in the past, Reborn gathers the other Arcobaleno to train Tsuna and his friends. He is also the one who explains to them that they will be tested by Vongola Primo's Guardian. Reborn will train Ryohei, as they both have Sun Flames. Reborn begins to stay to Ryohei's and Kyoko's house as being Ryohei's temporary tutor. Reborn was an audience to Yamamoto's trial. It was stated by Reborn that because Lampo hid inside a castle inside the amusement park and the only objective was for Lambo to acquire three stamps and go to him, it shows his obvious distaste for Lambo and the fact that he had not prepared beforehand. He goes to the amusement park with Lambo, Tsuna, Gokudera, and Yamamoto. Verde finally shows up himself, after sending all sorts of tests on Lambo and defeated by Lambo's Elettrico Cuoio. Reborn chides the defeated Verde and tells him that he is a tutor and should not do this to his student. During Gokudera's trial, Reborn is seen sitting on Namamori School roof top discussing with Fon, Collonello and Skull on their counterpart students.
39;s suggestion of a hideout, he decides to agree into hiding at the place Haru knows of.
Skull tries to brag about him and Hibari, but the rest of the Arcobaleno there ignores him. As Skull repeats his sentence many more times, Reborn calmly takes Skull and throws him off. During Hibari's and Ryohei's trial, Reborn tricks Skull into taking action on Hibari. When Skull tries to attack the school, he tells Tsuna, Gokudera and Yamamoto not to interfere with Hibari and Ryohei arguing and later, defending the school. Eventually, Reborn told Yamamoto to tell the first-year base ballers to evacuate from the school. After arriving back with the rest of the gang from the past, Reborn tells Tsuna that they do not have much time before the Real Six Funeral Wreaths appear from the teleportation system. Soon after Giannini gets the alert that they have arrived, Reborn goes and informs the rest. He flees the Vongola Base together with the rest as Squalo tries to buy time by fighting with Zakuro. Upon hearing Haru's suggestion of a hideout, he decides to agree into hiding at the place Haru knows of. Upon reaching the place, which turns out to be Adult I-Pin's ramen customer's place, (uncle) Kawahira suspiciously tells them that he knows what is going on and they can trust him on offline Zakuro. At first, Reborn was suspicious but decides to trust him. When Kawahira uses his Segno Hell Ring to create fake killer intent to lire Zakuro away, Reborn starts to ponder who exactly Kawahira is, he is being able to create strong illusions too.
When Kikyo, Bluebell and Zakuro arrive to take Yuni away, Reborn joins in Gamma and Tsuna in defending Yuni. Reborn sits on Basil's Alfin to travel to the air to help out, shooting at Kikyo, tell him that the Vongola do not fight alone but as a team. With that inspirational sentence, the rest of the Guardians become prepared to fight against Kikyo, Bluebell and Zakuro. Kikyo decides to retreat, leaving Reborn and the others behind. Fleeing into the forest according to Yuni's suggestion, he tells Tsuna that he has to come up with a plan to continue protecting Yuni from Byakuran. After seeing the slight conversation between Yuni and Gamma, Reborn decides to talk to Gamma about his feelings for Yuni. As Gamma and Reborn walk away from the camp, Reborn tells Gamma that he should stop treating Yuni like a child and admit her feelings towards him. In the following morning, following Irie's plan, he stays behind at the camp with Tsuna, Fuuta, Kyoko, Haru, Lambo, I-Pin and Irie himself (being injured badly from Choice). When the 7³ set ring bosses, the Mare and the Vongola calls, Yuni's Sky pacifier resonates and she floats upwards. Determined to protect the Arcobaleno's boss, Reborn tries to break the barrier around Yuni, only to get deflect off.