Kazuki Fuuchouin (風鳥院花月, Fūchōin Kazuki) is one of the major secondary characters in the manga / anime series GetBackers. He was also called by the Orpheus in Divine Design.
Appereance & Personality
Kazuki is the scion of the noble Fuuchouin family, and his fighting abilities derive from the family school, which emphasizes grace (麗). He is graceful and charming, and is often mistaken for a woman. Kazuki appears feminine due to his training as the Fuuchouin's scion because their technique emphasizes speed and grace. But when angered, his fury is such that his notorious other title is "Prince of Fear". Sometimes Ban mocks Kazuki for his feminine appearance. It does not help that he sometimes does wear women's clothes in his line of job as an information-seeker, as is shown when he coerces information about the Hall of Hell out of an Ura follower in a bar.
Kazuki is also often depicted as a naive person in terms of his relationships. He trusted his friends even after they betrayed him, leading to him being taken advantages by the likes of Saizou Toufuuin and Toshiki Uryuu. However, it is also his unerring trust that keeps his friends and followers to flock to him. Due to his job as an annaiya or information seeker, Kazuki knows a lot of things concerning the Infinity Fortress. His origins as the heir to a famous and ancient martial arts' school provides him with the privilege of knowing the truth about the estrangement between the Miroku clan and Mido Ban, as was shown during the Hot Spring Rest chapters. Kazuki is also knowledgeable about religions, history and cults.
His family house was destroyed, and his family killed, in a mysterious fire when Kazuki was in his early teens (which was revealed to be an attack by an enemy clan, who uses black strings); he subsequently fled to the Infinity Fortress with Juubei and Sakura Kakei, where he led a gang known as 'Fuuga' (風雅 Fūga, translation: 'Elegance') before joining Volts under the Thunder Emperor. He left the Infinity Fortress after the departure of Ginji and Shido, leaving Juubei behind. However, the IL retrieval brought them back together. Kazuki is usually an ally of the GetBackers, due to his friendship with Ginji. He and Ban tolerate each other, but are not close; Ban's unflattering nickname for him is "Ito-maki" (thread spool). As the leader of Fuuga, he once ascended into the Beltline to test his strength. At that time he was only able to survive for a week, but during that time he gained the nickname the "Prince of Fear" due to the cruelty he exhibited in order to survive the undead creatures of the Beltline. The cruelty was induced by the "Stigma" his left eye carries, as a sign of time lost to the Beltline.
As one of the Four Kings of VOLTS during its heyday, Kazuki was respected and feared by many, and also known outside underground circles due to his noble past. Even without using his Stigma his powers, rendered from the Fuuchouin arts, were already formidable enough to send enemies quaking. He was often considered the most powerful of the Four Kings, as was stated by Hevn during the IL Retrieval arc, due to his own fighting prowess, his connection with the ex-Fuuga members (who were themselves very highly placed in the VOLTS hierarchy, with Juubei alongside Kazuki as his aide and Sakura as MakubeX' caretaker) and his knowledge of the dangers of the Beltline and the nature of its people. However, Kazuki's gentle and compassionate nature, when not using the Stigma, often made him less confident to face his enemy, as was shown when he fought three of his comrades form Fuuga days.
In the Shinjuku area, Kazuki is an annaiya, or information seeker, who searches for information or a person for a price. This is shown when he helps Paul to seek for the whereabouts Takeru Teshimine, Ginji's foster father and former leader (and supposedly, symbol) of the Lower Level before VOLTS came into being. It is during this moment when he realizes that the forces of the Kokuchouin clan is at work in the mysterious depths of the Infinite Fortress. It is probably from his career as an information-seeker that he seems to be the most informative Lower Town resident (excluding MakubeX, the Gen Pharmacist and Koroudo Akabane) about the mysteries of the Infinite Fortress. While fighting against Saizou, who boasted of his strength after he activated his Black String seal, Kazuki explained to him that the 'Stigma' is not merely a device to increase one's strength. He said that the mark is a sign that one is chosen by the Infinite Fortress to achieve a specific mission, even in the face of death.
Get Back The Stradivarius Arc
Kazuki makes his first appereance while Madoka was being chased by a group of men. There he saw Ginji stating that the other three Kings of the Volts won't obey him; but Ginji says to him that he's the better one to rule the lower town since he once did and was known as the Prince of Terror. As they leave, Kazuki punishes the group of men for attacking a blind and inocent girl, sewing their eyes for they couldn't see anymore (in the anime, he just inmobilizes them). Later, Kazuki arrives while Shido Fuyuki and Ban Mido were fighting where he helps Shido. As Ban stats that it will be troublesome to fight two of the former Kings of the Volts, Kazuki leaves them.
I.L Retrieval Arc
As a request of Hevn, Kazuki joins the group to retrieve the I.L from MakubeX. Soon as they arrive, a poisonous gas from Horii makes them split. He ends with Himiko. On the way, he shows her why he was called the Prince of Terror killing everyone that doesn't answer his demands; but suddenly he starts attacking Himiko, trapping her with his strings. While saying he's the traitor of the group and that he works under Makubex orders, another Kazuki; this time the real one, appears. Kazuki easily defeats the impostor, Akame Kogenta, leaving him in a string spider web. Unfortenaly, as soon as he releases Himiko, she starts attacking him because she was being controlled by Makubex. He's capable of fighting her and release her from Makubex, but he's attack from behind by Juubei with his flying needles, leaving him a deep wound that caused him to faint; but not before he tricked Juubei and fake his death.
He's later found and healed by Ren and Gen, the pharmaucist. Gen helped Kazuki figuring out where Makubex hides and what the I.L is about and where he should go to rescue her friend. Kazuki leaves thanking them for all the help and quickly, he finds Himiko and Hevn. They continue together and fight several Wire-Dolls on the way until they find the rest of the group. They enter a special room prepared by Makubex, and as everyone rolled the dice and enter their specific room, Kazuki ended uo fighting at the same time Haruki Emishi and Juubei. Shido arrived into his help and both overwhelmed the other two. Kazuki and Jubei stay watching Shido and Emishi's fight until the end. Annoyed by Jubei's cold and indifferent attitude towards Emishi's near death, Kazuki starts fighting him with all his power, still the match stays equally. Juubei uses his blacks needles that almost kill Kazuki, but at the end, seeing the kindness of Kazuki even though he tried to kill him, Jubei attacked himself with his needles; causing his present blindness. Kazuki holds him and takes him with Gen to be healed and treated. Kazuki faints and is treated too.
Later, the ones staying with Gen, including Kazuki, watch how Ginji was transforming into Raitei; so everyone go to help him. On the way, they fight several copies of theirselves even they were in bad condition. They arrive with Ginji and Makubex, where the later one traps all of them in his almost perfect reality where he attack Kazuki, but thanks to Ginji, Makubex leaves them and starts fighting each other. As the fight ends and everyone is reunited like old times, Kazuki leaves with his friends, promising to Juubei and Ren that he will be returning more times to the Fortress to be with them.
Divine Design Arc
As Ginji and Ban are hired to retrieve the 5 sons, better known as the Fallen Angels, Kazuki is hired for this job too. As he goes with the GB duo, Kazuki recieve his divine card, "The Master of the Strings", which they figured out it's a part of each one. On the way, they disguises theirselves as artist to get some information about the children's location but they fell into a trap set by Tenzen Kyogokumaru; but thanks to Ban they are easily released. The groups splits up and Kazuki goes with Ginji and Hevn and soon, they start fighting a bunch of enemies but they easily defeat them. But as they continue their way, they encounter Toshiki Uryuu. Kazuki decides to fight him alone and "force him to open his eyes", but as Toshiki summons his divine card the King Of Hell, they disappear in front of Ginji and Heavn. Kazuki and Toshiki go to the divine territory and start their fight. Kazuki lands several attacks to Toshiki, but since his power doesn't work in the divine territory, he's overwhelmed by Toshiki's power and defeated.
Kazuki is later shown now being part of Lucifer's followers, but soulless, meaning that now he's a puppet. Kazuki is sent to the cementery where Hevn founds him mourning his own grave, and suddenly, traps Hevn in his Cocoon Prison stating that he will kill all those who interfere in Lucifer's plan, includen her, Himiko, Ban and Ginji. Hevn is able to escape thanks to her card, but Kazuki keep on attacking her saying now he's The Master of Strings Orpheus and overwhelming with ease Hevn now that he mastered the power of the cards too. In the hideout, Lucifer and the others discuss the losses of Gabriel, Remiel and Sariel caused by Hevn's arrival as Maria's trap; there Toshiki starts suspecting about Kazuki's control as he hears him laughing.
Later Kazuki joins with Toshiki in fighting the retrievers. He makes various deadly attacks to Ginji and when he was about to be killed by Kazuki, Juubei arrives just in time to save his life. Kazuki continues his fight but now this time only against Juubei and when his land his final attack "Meteor" against him, Kazuki is able to awake thanks to his red string he summoned earlier, dyed in Jubei's blood. Kazuki soon fell down because of the exhaustion, but as Toshiki and Jubei were about to finish their battle, Kazuki intervenes and put himself in the middle of both attacks, recieving even more damage; luckily, it wasn't so severe and he's able to told Toshiki that he turns his back to him because he knows him very well, that he would never attack an opponent from behind. Kazuki and Juubei reconcile with Toshiki but thanks to Lucifer's curse, Toshiki's hearth is tear apart from him. Kazuki watches with the others the final battle of Ban against Lucifer and as Lucifer is defeated; Maria Noches, Ban and Lucifer use a collective spell to revive Toshiki.
The three leaves now as a group and friends once more time.
The Eternal Bond Arc
Kazuki is seen fighting some men lookin for information about Teshimine but before he could get some, a black strink kill the informer. Suddenly, MakubeX calls Kazuki informing him about Madoka and Shido's situation, so he decided to go with all the team to rescue Madoka. After Ginji, Himiko and Ban finish their fights with the spider clan members, they see Kazuki who tell them that Madoka is located in the Hell Valley. Ginji is left behind because he lost his powers and Kazuki continue with Himiko and Ban in his place. As they arrive into Hell Valley, Kazuki starts explaining the 7 Kiryudo abilities and their attributes, but they are attacked by Genshu's warriors that were looking for Himiko. As he and Ban watch Ginji's helicopter falling down, Kazuki goes to see how was Ginji and upon arriving, he finds Ginji doing well along with Hevn and Akabane, which he later starts discussing almost to the point of a fight.
On the way to Madoka, they encounter Kanade Semimaru, the strongest chief of the Kiryudo 7. While Akabane fights against him, Kazuki fights alone the dozens of warriors; and when Semimaru overwhelmes Akabane, Kazuki goes in his help, protecting both Ginji and Akabane with his Shield Cocoon from the Warriors Semimaru's attacks. Juubei and Toshiki arrive in time to help the group against the Kiryudo. They manage to make the army run along with Semimaru, but now an even more giant army arrives. Kazuki with Juubei and Toshiki defeate all his enemies with some troubles since Ginji asks them not to kill them. For the exhaustion Kazuki fell down barely conscious and when they see a shadow in the trees they believe it's another enemy; luckily for them Kaoru Haruki, one of the three Maryudo, is the one to appear. She believes that if they risk their one lives for the sake of others, it's not their time to die, so she heals the three members of Fuuga. As they are healed, the three Maryudo start explaining their history with their enemies. On the way, Kazuki gets in a big discussion with Agi Ryuuhou which he ultimately was about to use his Energy Ball Sleeping Chakra against him; but as they arrive to the lake, the discussion stops. Shido awakens all the animal so they can cross the lake and for that, all of them starts fighting the insects that were sleeping thanks to Agi's technique.
As they arrive to the Kiryudo Castle, Kazuki and the others fight all the warriors while Ban, Ginji and The Maryudo go after Madoka. After Kabuto is defeated and all are revived, Kazuki leaves with Juubei and Toshiki, claiming that this was not only a victory against the Kiryudo but also against the God of the Infinity Fortress.
Voodoo Child Arc
Kazuki joins the competition with the old Fuuga members, including Saizou Tofuuin.
Get Back The Lost Time Arc
Kazuki plays a significant role to save Juubei, Toshiki, and Sakura who are manipulated by Saizou. He later duels Yohan to fulfill his destiny. During the fight, Kazuki uses all the top techniques from his family, but they are useless against Yohan. He ultimately uses the technique which was taught by her mother, and he realizes his duty is not to fight Yohan, but to establish a reconciliation.
Except for the only anime episodes, Kazuki's appereances are almost the same as in the manga. The I.L Retrieval arc follows the manga history. In the thermal waters is almost the same as in the manga except that Kazuki explains his girly appereance and also a little about his history before he arrived at the Infinity Fortress.
Get Back Makubex
In the alternate version of the anime, Kazuki arrives to help the GB duo as he learns that Sakura Kakei was attacked and MakubeX is kidnapped. As he arrives at the Infinity Fortress, they find Emishi being cured by Gen. Emishi explains that Jyouya Kanou was the one who attack him and Masaki Kurusu is the one behind all of this. The group splits thanks to Ren's trap as she was working under Masaki's orders. Kazuki ends with Jubei fighting against Jyouya Kanou and Toshiki Uryu, two wind masters. Kazuki is stunned about knowing that his former friend is now his enemy and when Kanou was about to attack him from behind, Juubei saves him with a succesful escape for the wind duo.
As they return to Gen, they found that Shido and Himiko are badly injured. The rest decide to go to the Belt Line and Kazuki leads the group. As Ginji is trapped by Masaki's trap, Kazuki and the others go after his help. There, Kazuki tries to fight back Masaki's light beams but without succes and only for Masaki to disappear.
As Juubei also disappears, Kazuki goes after him to stop his fight against Toshiki, and that fight ends up as in the Divine Design arc where Kazuki steps in the middle of their fight. Kazuki explains him that he knows him very well and he always considered him a good friend. Also he said the same to Ren. At the end and with all the fights ended, Kazuki stays know with the new Volts with Toshiki, Masaki and Kanou know in the group.
Kazuki uses white koto strings (in the manga's English translation, they were described as harp strings) in battle;it is used to affect a persons facial feature and is very very sharp and can even tear up solid earth, bones, skin, muscles and sometimes steel based on the vibrations of the finger; the strings also have other uses such as listening in on distant conversations. The Fuuchouin String Arts is regarded as one of the most versatile fighting techniques in the Infinity Fortress as it comprises attack and defense using the same weapon. Because of these skills, he is often called "Ito no Kazuki" (絃の花月 Kazuki of the Strings), an epithet which, albeit sounding harmless enough, is one of the most feared names of the Infinite Fortress. The strings are stored in two bells tied to the front right strand of his hair to ease manipulation (most of the time, Kazuki is portrayed as a dominantly left-handed person, as he wields the bells among his left fingers and manipulate them with his right—a task usually linked with the less dominant hand. However, in his battle against Saizou Tofuuin, he displays some dexterity with his right hand). Ayamine Rando once joked that Kazuki's strings come from the fourth dimension (referring to Doraemon; Kazuki's bells are resemblance to the blue cat robot).
Though his fighting skills are far above average, Ban often discredits them. Also, it can be noted that he often ends up badly hurt even if he wins a fight. Sometimes, he even loses them as well. (To be fair to him, Ban often gets whacked up too before he wins a fight.) To emphasize his "mid-tier" status, even as he was berserking as the Prince of Fear, Shido Fuyuki was able to stop him easily by grabbing his arm firmly without using any special powers. Indeed, Yohan mentioned to the Voodoo King that perhaps the Beastmaster would be an even greater threat than Kazuki. However, this is mainly because of the influence of Shido's Chimera, a relic of the Maryuudo and one of the three keys to Babylon. During the IL arc, Kazuki describes his art as derivations from natural phenomena, particularly those connected to water such as mists and rains. This is why many of the techniques are named after such phenomena, for example 'Torrent' and 'Misty Rain'. Kazuki's greatest technique, the 'Empty Moon', uses super-fast strings to shut his enemy, creating a vacuum which will be opened later, much like the lunar phases, forcing the air from outside to slash his opponent. This technique was used on Saizou, an ex-Fuuga member who supposedly betrayed him but was actually protecting him from Youhan's purges. However in the Divine Design arc, when Uryuu orders Kazuki (under his alter ego as Orpheus) to use his strongest attack on Juubei Kakei, Kazuki launches the 'Comet', a technique where Kazuki shots uncounted strings towards his opponent from above, much like the celestial phenomenon itself.
The arts can be described as integration of the feminine movements with surprising amount of power. Juubei had described Kazuki's battle movements as an intricate dance: as such most of the ancient martial arts described in the Getbackers series had been described as such, particularly those of Juubei and Toshiki Uryuu. Accounts vary as to how many years the practitioners of the Fuuchouin had to wear the female kimono in order to obtain the necessary grace to execute the techniques: in the Hot Spring Rest arc, Kazuki stated a period of 15 years, while in the Get Back The Lost Time arc, the period was 12 years. It is also not evident whether this practice apply to every practitioner of the arts or only to certain talented individuals, or even only restricted to those of the main line of the Fuuchouin itself. On the other hand, the Higashi-Fuuchouin and the Kokuchouin clearly did not practice this tradition. Amongst the feminine arts practiced (at least by Kazuki) were dancing and the playing of the koto, long regarded as a feminine musical instrument in traditional Japan.
The reason for Kazuki's strings' unnatural strength is the amount of vibration applied on them by Kazuki's fingers. Though it is hard to imagine how to make the countless strings vibrate whilst performing the intricate techniques, Kazuki seems to be able to do so naturally (One theory is that he focuses his "qi" through his strings. Indeed, he could often be seen concentrating before unleashing his moves. If so, Juubei's notion that 'the Fuuchouin and the Kakei are derived from the same style, which, if combined, will have enormous power' is true, as the Kakei-ryuu is often shown as a 'qi' manipulation technique). This vibration technique must be particularly potent as Kazuki's string shields can protect him from virtually any physical attack, as was shown when he protected Ginji and Kuroudo from Semimaru Kanade, the most powerful of the Kiryuudo 7, in the 'Get Back the Eternal Bond' arc, and even explosions, as was shown when he, Shido and Ren were caught off-guard by Masaki Kurusu in the latest arc. However, it has been shown that this shield can be broken by sufficient strength, or completely by-passed (by Masaki's "light", for example).
Among the Fuuchouin-ryuu techniques commonly used by Kazuki are:
- Rain Showers or Rain Spears (multitude of strings falling on an assailant whenever the subject moves. Used on Kakei Juubei, Toshiki Uryuu, and Saizou Toufuuin), This seems to be Kazuki's signature attack as it is the most commonly used. In retrospect, however, the effect of this technique is trivial compared to other styles.
- Misty Rain (a technique in which the strings seem to disappear only to attack the assailant from an unexpected direction. Kazuki explained that the technique resembles a wet man trapped in a mist; allowing no chance whatsoever of escaping. Used as the final coup de grâce against Juubei in IL arc)
- Jade Shield (strings emanating from the bell in Kazuki's hand form an inverted triangle. Used for frontal attack. Has been compared to the Santen Kesshun technique of Orihime Inoue)
- Cursed Binds (to paralyze enemies. Said to cut enemies into seven pieces if he or she moves. Also used by Saizou Toufuuin to bind Emishi Haruki)
- Book of Defense 15:3 - String Cocoon (strings surround Kazuki and anyone else and protect him (them) from any attack. Used against Semimaru Kanade).
Apparently, the strings can also be manipulated to resemble actual weapons, i.e. spears, axes; this technique, which remains unnamed, is almost exclusively used by the Ura-Fuuchouin initiates, most evidently bu Yuri Kokuchouin. However, during Kazuki's duel against Saizou, he manipulates his strings to form giant balls from which any strand (effectively resembling a rocket) can escape and attack his assailant. Another Ura-Fuuchouin technique involves using strings to change the external appearance of oneself. Extensively used by Maiya Kokuchouin and, to a lesser degree of virtuosity, Akame of the Mugenjou, the technique is said to originate from the Nishi-Fuuchouin. Maiya is also able to wrought string puppets of herself. By using the Infinity Fortress dimensional rift, she is able to hide in another dimension and subsequently used the self-regenerating puppets to attack her enemies to death. Due to this she is counted stronger than her berserker brother Yuri. However the strongest Ura technique is credited to Yohan Kokuchouin, in which his movements alone is able to nullify the combined effects of the Flower•Bird•Wind•Moon. His ultimate, using string projectiles in shape of origami cranes, is able to render explosions and is almost impossible to evade due to the sheer number of the cranes.
An unnamed technique involves constructing a wall of strings around a person or a group of persons, effectively restricting the movement of the targets. Probably derived from the Cursed Binds, the seemingly basic technique can even stop the Getbackers' progress when used by Saizou to impend their progress at the end of the Queen's Cup Challenge arc.
Unique techniques (shown only once, usually include a series of number to imply the technique's sequence in the Fuuchouin-ryuu) include:
- Dance of the Red Sparrow (used against Saizou during the duel of their youth. Kazuki runs towards the enemy, with strings surrounding his person. Unknown effect. Equivalent to Higashi Fuuchouin-ryuu technique Dance of the Green Dragon).
- Coffin (used against Hevn during the Divine Design arc, under his alter ego Orpheus)
- Comet (used against Juubei during the Divine Design arc)
- String Shield (three mere strings which can stop a heavy demolition ball swinging at full force. Used against the Ura follower in the bar)
- Bee~Snow~Moon (binding technique to render massive damage to nervous system, completely paralyzing the enemy permanently if not undone immediately. The name implies a bee in early winter dying from the cold, much like the victims of this gruesome technique. Used against the Ura follower in the bar)
- Phoenix (used against Youhan. A mysterious technique that Kazuki was not supposed to know, it seems to belong to the feminine branch of the Fuuchouin technique, as it was passed only by those who married 'into' the Fuuchouin clan, as opposed to actually being one)
There are also a few healing techniques in the Fuuchouin-ryuu, but most concern the effects of the Black Strings. Among them are:
- Unbinding (A musical string used to undo the Black Seal of the Kokuchouin)
- Waterfall (to heal the souls of those trapped in the Black Cocoon. Used against Maiya and Yuuri).
There is also a separate technique used by the Fuuchouin 13 Strings, the bodyguards of the Fuuchouin patriarch. The technique revolves around plurality, in the sense that the strings used are controlled by many people at once, giving extra strength and flexibility. One of the techniques used against Juubei was Flower-Viewing, in which multitudes of strings were bound around the body of the victim, supposedly suffocating him or her to death: effectively the Coffin technique handled by 13 individuals.
It has been revealed during Kazuki's duel against Youhan that the ultimate technique of the Fuuchouin-ryuu is #99, the Flower•Bird•Wind•Moon. The technique is actually composed of four separate fighting techniques derived from natural phenomenon connected with the name. The techniques are:
- Flower Dances (like falling flowers having no axis, strings will fall on the victim from unexpected directions)
- Hurricane (strings will spin to create sharp currents to slash the assailant)
- Bird of Thunder (resembles 'Comet')
- Empty Moon
It is originally thought that the essence of the ultimate technique lies in 'Moon'; thus the strongest Fuuchouin-ryuu technique would be the 'Empty Moon'. However Kazuki's mother remarked that the true essence lies in 'Bird'—which is beautiful like the flowers, moves fast like the wind and can fly high like the moon—and it was to this assumption that the 'Phoenix' technique was derived from. The technique itself was called 'Fuuchouin-ryuu, side chapter', remarking its incandescent position as a technique unknown even to the patriarch of the Fuuchouin clan.
In the anime, Kazuki's true strength is never shown, (or rather downtoned, for the sake of the children in the audience) albeit it seems that a lot of people fear him, or at least heard of his (notorious) prowess as VOLTS' "Ito no Kazuki". In the manga, the true essence of his battle potential (or rather, the strength of the Fuuchouin-ryuu) is regularly shown, in order to give contrast to his gentle demeanour. For instance, Kazuki can rip away arms and legs, bind people to the point of losing the nervous system, sew people's eyes and mouths for showing disrespect before him and put people under 'cursed binding strings' (note: not black strings) which cut people into seven pieces if they are to move a muscle. Kazuki is one of the fighters which earned the respect of the Kiryuudo 7, and remarked as 'able to fight one against hundred' Kiryuudo warriors, which are far stronger than human. In 'Get Back the Lost Time', when Kazuki totally lost self-control in his 'Stigma'-induced Prince of Fear mode, he is shown smiling gleefully amidst bloody Ura fighters, many of which are already decapitated by his strings, with blood spattered on his face. Before that, during the 'Oath' Rest arc, he spends a few sleepless days pursuing people connected to the Ura and killing them mercilessly in the backstreets of Urashinjuku, as revenge for the taking of Juubei, Uryuu and Sakura. In the final arc, he is depicted as able to destroy a large section of the Beltline simply with the effects of his duel against Saizou.
Aside from the usual white strings, Kazuki also uses a special string, the Red String. In the Divine Design arc, when Kazuki's soul was trapped by Uryuu, the Red String flew from his side to Juubei so that Juubei knew that Kazuki was in grave danger. In an intense moment it is revealed that the Red String is a symbol of an oath between Kazuki and Juubei, apparently made after the massacre of the Fuuchouin clan, that whenever Kazuki 'strays' (as is shown when he is under the Divine Design spell), Juubei is to kill him to save others from Kazuki's purges. Juubei, however, does not kill Kazuki in the moment but let his blood, derived when he received the 'Comet' from Kazuki, reddens Kazuki's white strings so that the illusion of 'red' strings will remind Kazuki of their oath and release his ensnared soul from the Divine Design world. In the manga, Kazuki also used the Red String to summon Saizou Toufuuin, another member of the Fuuchouin String School, to him when the Fuuga team was assembling to get ready for the tournament in the Voodoo Child arc.
In Japanese culture, the "red thread" has a symbolic meaning comparable to the ideology of "soul-mates" in Western culture. The fact that Kazuki's Red String represents his oath with Juubei had been taken by fans of the series to imply a romantic relationship.
Kazuki has a Stigma in his left eye and when he reveals it, his fighting strength increases drastically. He obtained it after dwelling in the Beltline.
- His name Kazuki means "flower" (花) (ka) and "moon" (月) (zuki).