Mitsuki was created as a synthetic human by Orochimaru, being cultivated from the same embryo as at least one older "Mitsuki". Just like his "brother", Mitsuki was named after "Tsuki" (杯, Literally meaning: Vessel) and the sixth sign of the Chinese zodiac calendar, "Mi" (巳, Literally meaning: Snake). Orochimaru, as Mitsuki's "parent", wanted Mitsuki to find his independence, having concocted a complex plot for Mitsuki to do so. On Orochimaru's sixth attempt of the plan, each time erasing Mitsuki's memories of the previous, Mitsuki mastered Sage Transformation and decided to rebel against his "parent" and "older brother". He left their company and set out to forge his own destiny himself, now going by the name "Mitsuki" (巳月, Mitsuki) by replacing the second character with "Tsuki" (月, Literally meaning: Moon). Upon discovering the existence of Boruto Uzumaki via a gift from Orochimaru, Mitsuki decided to go to Konoha and befriend him in order to find his own path in life.
Mitsuki has a very calm and matter-of-fact demeanor. He is generally seen very cheerful, if not indifferent, the situation at hand. While not confrontational, he freely speaks his mind in any situation and does things at his own pace. He is also shown to have a sharp wit, being well-read and observant, showing advanced knowledge in mathematics. He's quite close with Boruto, caring about his opinion above that of most others. Seemingly stemming from his harsh upbringing with Orochimaru, Mitsuki is very vicious in battle, showing no restraint and willing to kill his foes without hesitation. He is also very driven and committed when given a task, as when he was ordered to kill someone, he would not waiver regardless of who it is. During his time at the Academy, it doesn't seem as though he had much of a friendship with Sarada Uchiha until they were assigned to Team Konohamaru.
Despite not revealing much about his origins or parents to them, Mitsuki cares about his teammates, Boruto and Sarada, to the point where he never hesitates to rush to their side when they are in danger or in need of assistance. Mitsuki has a high opinion of Boruto as the son of the Seventh Hokage and the grandson of the Fourth Hokage, and Mitsuki believes Boruto is destined to become Hokage himself one day, despite hearing Sarada's repeated declarations that she will be Hokage.
Mitsuki seems to admire Naruto and Sasuke Uchiha due to them both being high-ranked shinobi and tells Boruto and Sarada how his parent told him their fathers are rivals who can fight equally. Mitsuki also holds a great deal of admiration for his father as well as confidence in his abilities, to the point of being naive, as shown when he boasted to Boruto and Sarada that Orochimaru was even more powerful than both of their fathers.
Mitsuki has tousled white-blue hair, thin eyebrows, with golden eyes, and a pale complexion that he inherited from his father. According to several of the girls in his class, he is very handsome.
His attire consists of a loose-fitting two-toned light and dark blue kimono shirt with billowing, overlong sleeves, tied by a thick khaki-grey Ono-stylised belt, and a pair of navy pants. In addition to his outfit, he wears black long fingerless gloves and black calf-length shinobi sandals. Upon becoming a shinobi, Mitsuki starts wearing a black Konoha forehead protector on his head.
Mitsuki is an exceptionally talented shinobi for his age, noted by Orochimaru to be genetically perfect and potentially more powerful than the Sannin himself. This is possibly due to being a synthetic human clone Orochimaru created. In the Academy, he greatly excelled in both ninja and scholastic learning. He could hold his own against older shinobi and was able to progress to the finals of his Chūnin Exams.
Chakra and Physical Prowess
Mitsuki has extremely high chakra levels for his age, enough to achieve Sage Mode. He also is extremely quick and agile, able to avoid attacks and redirect them against the enemy. He is very advanced in taijutsu. Like his father, Mitsuki's fighting style is shown to be very fluid and graceful, able to seamlessly slip through his opponent's defenses and strike with great flexibility. Akin to a snake, his specialty appears to be body holds and chock-outs. He was also able to hold his own against Suigetsu Hōzuki in a brief scuffle.
Mitsuki's signature technique is the Soft Physique Modification technique, where he can stretch contort his arms to use as weapons and restraints. He also can shatter barriers using an unknown technique, simply by touching them. Albeit he wasn't seen using it, he was carrying a sword at one point, hinting at skills in kenjutsu. In the anime, he showed considerable cutting prowess, able to slice cleanly through a metal beam. He also notes that he excels in escape-based techniques. He is also shown to be very stealthy, regularly able to sneak up on his classmates without them noticing. In addition, he can also use sleight-of-hand tactics, concealing needles in his mouth to launch at his opponent with considerable might.
Mitsuki can use the Summoning Technique to summon snakes, with which he can perform Hidden Shadow Snake Hands, as well as the Snake Clone Technique. Upon reaching one of his snakes the scents of his friends, Mitsuki can use it to track down his comrades. He also excels in Medical Ninjutsu, curse techniques and can use Wind Release to create strong winds.
In the anime, he is also proficient in Lightning Release, able to create a discharge of electricity. He is a skilled sensor, able to detect the enemies' presence throughout the area. Mitsuki has shown the ability to heal his own injuries without requiring hand seals. He can also extend his fingernails into claws for combat-related purposes.
Mitsuki possesses the ability to use Sage Transformation; albeit he is only able to access this ability subconsciously. Unique to him, he gains a cyan chakra shroud that forms into ethereal snakes around his body to aid in his attack range, and he grows out a single horn from his forehead. Mitsuki is also able to achieve Sage Mode, making him one of the youngest people to achieve it.
His speed increases tremendously, as shown when he was able to snatch a scroll and key from Orochimaru before he had realized that Mitsuki had moved.
Mitsuki has been shown to be quite intelligent. He has a sharp wit, he is observant in combat and he also has advanced knowledge of mathematics.
After immigrating from the reconstructed Otogakure to Konohagakure, Mitsuki was allowed to enroll in Konoha's Academy as a transfer student as a sign of mutual trust between the villages. In the anime, before joining the Academy, he watched a class from afar, silently observing when a strange summoning went on a rampage before being subdued. Later, when an expelled student of the Academy was causing damage to the village (being possessed a Shadow Spectre) Mitsuki intervened and quickly stopped him. In doing so, he met Boruto, Shikadai Nara, and Iwabee Yuino. The following day, he was introduced at the Academy as a new transfer student. Taking an interest in Boruto, Mitsuki decided to sit next to him. During combat training, Mitsuki quickly showed himself to be very advanced, easily defeating Iwabee, but also trying to kill him. He was ultimately stopped by Boruto, who voiced his disdain at such actions, prompting Mitsuki to apologize. Later that night, Mitsuki was in contact with someone through a white snake.
The following day, Shino Aburame decided to use homeroom to have a welcoming party for Mitsuki. When Shino's efforts for the party backfired with his insects, the class began to freak out, with Denki begging someone to make the insects go away, to which Mitsuki did with his Wind Release: Breakthrough, causing even more damage to the Academy. Afterward, one of the repairmen went berserk, causing even more damage to the Academy. Mitsuki realized that the man had the same dark aura about him as the expelled student from earlier, impressed that Boruto was also able to see as well. Working alongside his new classmates, they were able to subdue the man. The following day, Mitsuki, along with Boruto and Shikadai were called to the training fields for an extracurricular lesson from Shino. When their teacher appeared, he was under the same possession as the others. Shino then encased the entire area with his insects, forcing the students to flee. After a prolonged chase, Shikadai devised a plan to stop the rampaging sensei. While Shikadai and Boruto distracted Shino and lured him into the water, Mitsuki ensnared Shino and electrocuted him, expelling the specter. This act stopped Shino's rampage but left Mitsuki exhausted and began sinking to the bottom of the lake. He was saved by the then recovered Shino. This ultimately made him acknowledge Shino's worth as a teacher.
Later, while walking talking with Boruto and Shikadai about the recent attacks, they found some of the girls subduing a boy. They learned that the boy, Magire, was a student from the Academy and had a crush on Sumire. When his feelings were rejected by Sumire, he ran away. The following day, notes were being left all over the Academy for Sumire. Eventually, it was revealed to be done by Magire, who was being possessed by the specter and ultimately kidnapped Sumire. Mitsuki watched as Boruto and Shikadai battled Magire. Ultimately, it was Chōchō that was able to reason with Magire, helping him to calm down and reject the specter. Afterward, Magire collapsed from having most of his chakra drained by the spectre. Later that night, Mitsuki again reported to an unknown person through his white snake, saying he would continue his investigation as to why only Boruto can see this spectre. Eventually, Boruto came to the conclusion that his special eye power was the Byakugan. However, after Boruto tested the theory with his grandfather, Boruto learned that to not be the case. Despite this, Boruto was still determined to figure out the true nature of his eye, surprising Mitsuki with his mature attitude.
Determined to find and capture the specter, which Mitsuki liked Boruto's name of "Ghost", they and Shikadai decided to resort to skipping classes with a faked excuse. Due to Mitsuku's poor written excuse, they were quickly found out. It was decided that the three as punishment would have to take after-school classes to make up the lost time. Later, Shino assigned his class to tail other workplaces to better understand non-shinobi life. Seeing Boruto's desire to continue patrolling the village, he subtly convinced Boruto, Shikadai, and Mitsuki to try the postal service. While sorting stamps, they heard on the news that another attack happened at the water purification plant, where Sumire was. Mitsuki and his friends quickly rushed to her aid.
After making sure the Sumire was okay, Mitsuki and his friends were approached by Naruto. Realising that they were investigating the attacks as well, he showed them what became of the culprit's victims; near-complete chakra depletion that required intensive care. While telling the children to stay away from the matter, Shino appeared, insisting that they trust in his student' effort, which Naruto ultimately agreed to. It was then decided to get extra help from their classmates, realising that Mitsuki's team was being spied on. After everyone was given their area to cover and left the post office, the mysterious culprit controlling the spectre unleashed it on the post chief. However, Mitsuki's group anticipated this action, corning the culprit. As the ninja retreated and slipped away from everyone else, Mitsuki soon found him. After a stare-off, Mitsuki withdraw his pursuit, letting the culprit escape. After returning to his group, Mitsuki helped in cleaning up the post office.
As classes continued, Mitsuki continued to show noticeable interest in Boruto, he began asking his various classmates their views on him, intrigued by their various two-sided answers of finding him troublesome but fun. Ultimately, he asked Boruto if he can join him for dinner at his house, which he agreed to. On that night, Naruto surprisingly was able to join them for dinner. However, as dinner began, Naruto learned that a strange chakra was being dispersed throughout the village, prompting him to leave. Boruto was furious at this, seeing his father leave at the slightest notices. Seeing Naruto's duties as Hokage as someone who would sacrifice those closest to him for the sake of the entire village, he was determined to stop the spectre before Naruto to prove his father wrong on his methods. Mitsuki than revealed he knew who the culprit was.
He declared it to be Sumire. Boruto rebuffed such an accusation, but Mitsuki insisted it was true after having done his own research. Suddenly, there was a large earthquake in the village, followed by the emergence of the spectre, now in a tangible form. Mitsuki was contacted again through his snake, given the order to kill the Sumire. Mitsuki told Boruto that they can stop the creature if they kill the summoner. Boruto refused to kill his friend, prompting Mitsuki to restrain him with a snake clone. Mitsuki found Sumire and attacked her, who was able to fend off his initial attack. As Mitsuki managed to pin her and prepared for the kill, Boruto arrived, distracting Mitsuki enough for Sumire to escape. Sumire proclaimed that the girl they knew never existed. Boruto continued to get between Mitsuki's attacks. Suddenly, Boruto's right eye began reacting randomly, causing the Nue to teleport above them. Sumire calmly offered herself to the creature to complete its development. While she was swallowed whole and dragged into a space-time portal, Boruto quickly jumped in after her.
In the pocket dimension, Mitsuki aids Boruto in fending off Nue. As Boruto managed to restrain it, Mitsuki prepared to kill Nue. His effort was blocked by Sumire. As Mitsuki again battled Sumire, Boruto took a kunai blow from her to halt the fight. Boruto insisted that vengeance doesn't have to be her path. Rattled and torn between all she knew as Boruto continued to befriend her, Sumire told Nue to take her chakra and finish the plan, only for the creature to snuggle against her. Boruto surmised that having been the one who raised Nue, it came to view Sumire as its parent. Boruto insisted that Sumire doesn't want violence and knows she doesn't want the beast to follow the same dark path that was forced on her. Letting go of her anger, it broke the summoning contract on her back, causing the dimension to start crumbling. Boruto reached Sumire and convinced her to join him, leaving Mitsuki amazed at Boruto again finding an answer that defied logic. Boruto found the portal back home. Upon arriving, they were found by their friends and elite ninja. Sai, who could sympathise with Sumire's past, offered to help her build a new path for her. Sumire willingly turned herself in.
Several weeks later, Shino decided to change up the three-man teams for their next challenge to determine the optimum pairings for graduation. Mitsuki insisted on staying on Boruto's team and also teamed-up with Lee. During their challenge to capture a flag, Mitsuki cut on of the construction beams to stop his opponents, allowing Boruto to get the flag. Shino was then called aside concerning Sumire. As the class began discussing rumours that Sumire was being transferred to a different school, they were relieved to see her return to their class.
Sarada Uchiha Arc
Upon hearing that he and the rest of the class will be going through graduation exams in a week, Mitsuki eagerly said to Boruto that the day has finally arrived, to which Boruto agreed, claiming it would be a piece of cake. He later ran into Chōchō Akimichi and Sarada at a restaurant and had a little chat with the girls, noting that questioning their identity and self-worth is common for girls their age and is commonly referred to as their "tragic heroine syndrome". Mitsuki was also able to determine from which clan Chōchō hails, not only from seeing her family crest but based on her appearance as well.
Later, Mitsuki joined Boruto in a simple errand of deliver lunch to the Hokage from his wife for the trip. After arriving too late, Sarada and Chōchō offered to leave the village and bring it to him. While Boruto felt it pointless, he soon saw the strong desire in Sarada's eyes. Mitsuki, also realising this was important to the young Uchiha, asked Chōchō to give them a minute, who wondered if this was a love confession from the boy. Mitsuki simply replied that her symptoms were getting worse and that she needed professional help.
Versus Momoshiki Arc
After graduating from the Academy and becoming a genin, Mitsuki is assigned to Team Konohamaru with Boruto and Sarada. Mitsuki and his team are sent on a mission to capture a giant panda. As Boruto used his shadow clones to subdue the panda and Sarada was irritated at him for his disregard for teamwork, Mitsuki told her to leave it all to Boruto because he is the Hokage's son and is likely to become Hokage one day, much to Sarada's chagrin due to her declaration she will become Hokage. After the mission, they reported to the Hokage's office where Boruto and his father got into an argument. Boruto warns him not to miss his sister's birthday otherwise he would never forgive him before storming out. Mitsuki and Sarada met up with Boruto later on to inform him that the Chūnin Exams are starting soon, although Boruto declares that he has no interest in taking part in them which causes an argument between Boruto and Sarada. When Boruto asks Sarada if her father will come to watch the Exams, she replies by saying that she doubts it and after briefly discussing Sarada's father, Mitsuki says that he was told by his parent that Sasuke is the only one who is able to fight equally with Naruto. This leaves Boruto and Sarada curious about his parentage. However before Mitsuki can tell his teammates who his parent is, Hinata and Himawari arrive to pick Boruto up for Himawari's birthday party.
Mitsuki enters in the Chūnin Exams with his teammates, although it takes some scolding from Sarada and meeting Sasuke to get Boruto to agree to enter with him and Sarada. The first round of the Chūnin Exams is a true or false quiz regarding a question about the fifth volume of a novel series. When it is revealed that both answers are incorrect, each team is unexpectedly dropped into a pit with a lake of ink at the bottom. Mitsuki stretches his limbs to keep himself and his teammates from falling into the ink and Sarada deduces the quiz was a sham all along and that anyone who falls into the ink is disqualified. Having successfully avoided falling into the ink, Mitsuki and his team progress to the second round where the teams compete for flags. Mistuki and Sarada go off to try and steal other teams' flags while Boruto stays behind to defend theirs. When Boruto is attacked by another genin team, Mitsuki decides to go back to help him. However, by the the time arrives, Boruto had already defeated the other genin (with the use of his Kote). They are ultimately successful in acquiring other flags as well as protecting their own. When they regroup, Sarada scolds Boruto for not being happier that they passed before commenting that his eyes are even bluer than Naruto's, to which Mitsuki agrees after unexpectedly getting up in Boruto's face and giving him a fright.
In the third round, Mitsuki was able to beat Toroi. Before his upcoming match against Araya, he and Sarada watch Boruto's fight against Shikadai Nara and was disappointed when he was disqualified for cheating. Soon afterwards, Momoshiki and Kinshiki Ōtsutsuki attack. Mitsuki and Sarada help evacuate children from the area. He became concerned for Sarada when it appeared that she had been crushed by falling debris, but was then shown to be relieved when he saw that she had been saved by her father. After Momoshiki and Kinshiki left, Mitsuki tried to comfort Boruto when he found out that Naruto had sacrificed himself. When Boruto, Sasuke and the other four Kage prepared to travel to another dimension to rescue Naruto, Mitsuki accompanied Sarada, Sakura and a worried Hinata so that she could stop Boruto from going on such a dangerous mission. However, Hinata ultimately agreed to let Boruto go after seeing his determination and how much he resembled his father when he was younger. Before leaving, Boruto asked Mitsuki and Sarada to take care of the village while he was gone.
After the ordeal, Mitsuki joined his teammates on a mission to catch a giant panda that was running loose within the village. The three of them have a brief conversation in which Boruto states that he wants to be a shinobi like Sasuke, before they jump from the Hokage Rock and into the air and shortly complete their mission.
Mujina Bandits Arc
While Team Konohamaru is on a mission to capture the Mujina Bandits, Mitsuki ends up capturing and tying up one of the bandits to a tree. A few days later, Mitsuki's team was surprised to be presented with their first B-rank mission. While Sarada and Boruto were intimidated at first, Mitsuki noted that the Fifth Kazekage was known for doing B-rank missions while a genin himself, quickly exciting his team-mates. On the day of the mission, when Boruto abandoned the mission for personal reasons, Sarada had Mitsuki track their teammate down to help. They arrived into time to save the paralysed Boruto from Shojoji, quickly subduing and defeating the bandit. Later, while applauded for saving Tentō and capturing the Mujin Bandits, Konohamaru also said they would have to be punished for abandoning their official mission.
Weeks after the capture of Shojoji, Naruto joined his son in a sparring match in front of the Academy students and other spectators. While Boruto showed considerable improvement in his techniques, Naruto was somehow able to nullify them all. Mitsuki determined that Naruto was actually absorbing the techniques. After the match, with which Naruto learned, it was revealed that Naruto was testing a new advanced ninja tool based off of Momoshiki's absorption power. While Boruto was furious at the deception, Sasuke calmed Boruto down, noting that this was necessary as the danger to their world was still very imminent.
- (To Orochimaru and Log) "You adults can't tell me what to do. I'll decide what I want to do for myself!"
- (To Chōchō and Sarada) "That is commonly referred to as your tragic heroine syndrome. The condition is said to afflict young girls of a certain age who lack a certain self-awareness as they try to establish their sense of self… Well… that is if you care about such trivial things."
- (To Boruto and Sarada) "Sasuke is the only shinobi who could rival the Seventh Hokage; that's according to my parent, who's even more awesome than both of your dads."
- (To Boruto and Sarada) "It would be nice if you showed some respect for my parent, too."