Kagerōza Inaba

was the 7th Seat of the 12th Division & Chief of Precipice World Studies within the Shinigami Research and Development Institute. He, along with Nozomi Kujō, are Mod-Souls that were initially part of another Mod-Soul created by Ōko Yushima.

Appearance
Inaba, while working with other 12th Division members, wears a standard uniform which is a laboratory coat over the standard Shinigami shihakushō. He is quite tall, thin with chin length straight hair that parts on the left side of his head. The right side of his hair is green and the left is yellow. He has a somewhat long face with circular glasses and white gloves.

When not with others, he wears a long yellow robe that buttons up in the front and protrudes upwards from the neck, covering the entirety of the back of his head. He does not wear glasses and wears gloves and carries a cane. Inaba's flamboyant attire bears a strong resemblance to that of Mayuri Kurotsuchi's, as noted by Uryū Ishida.

Personality
While he is working with other 12th Division members, he is quite polite and obeys orders given by higher ranked members. When pursuing Nozomi, he is quite rude to Kon and heartless when he strikes the girl's abdomen. He is also shown to have a profound respect for Mayuri Kurotsuchi, although this respect extends to Inaba believing he is superior in all aspects to him. Despite this, he seems to care about Nozomi to some degree, which is shown when he implores her to get out of the way of his attack, as she might die. After the attack, he claims that he is relieved that she is okay. He also has a strong contempt for those who forbade “his” research into Mod Soul science, especially the members of Central 46, to whom he deems were "afraid of his research". As stated by Nozomi, Inaba's being is filled with rage and ambition from Yushima.

History
96 years ago, a Shinigami named Ōko Yushima invented the Mod-Souls. They were created for "Project Spearhead", which was designed to use the Mod-Souls in the dead bodies of humans in order to fight against Hollows. The project was later terminated due to “moral concerns.” In actuality, Central 46 canceled the project due to deeming the ability to freely control the capabilities of Mod-Souls a possible threat. When everything was to be destroyed, Yushima converted all the information into special Reishi and tossed it into the Dangai before using some of his own reishi as a basis to create another Mod Soul. By unknown means, the Mod Soul became split in two to create Inaba and Nozomi Kujō. Inaba would inherit the memories of Yushima and would follow suit in fulfilling Yushima’s wish to one day complete his research while hiding among the Shinigami. Following Yushima's final orders before putting himself in a catatonic state, Inaba hid himself amongst the Shinigami and worked his way up to the position of 7th Seat in the 12th Division. During this time, he researched the Dangai as a cover in order to find a way to retrieve the Mod Soul data from the Kōtotsu. Also during this time, he created the Reigai.

Gotei 13 Invading Army arc (anime only)
Note: Events occurring in this arc are only in the anime and do not constitute canon material.

In the Shinigami Research and Development Institute, Akon requests a record of traffic through the Dangai from Inaba. He brings a book into the area where Akon is discussing Nanao Ise and Rangiku Matsumoto's whereabouts with Captains Hitsugaya and Kyōraku. Inaba reveals that there is no confirmation of the pair returning through the Dangai. Later, while Akon and Hiyosu are reading the message sent by Rukia, Inaba enters the room and Akon tells him that Byakuya Kuchiki and the others are about to enter the Dangai to conduct a survey. He instructs Inaba to show them the way. Before he leaves, he sees Rukia's message and the image of an unconscious Nozomi Kujō and grins.

In a room with a large number of Reigai piled up on one wall, he takes off his glasses and puts a new set of gloves and a cloak on and takes a cane with him. Immediately after, he uses his cane to move two figures with the exact same appearance of Izuru Kira and Nanao Ise away from the door. He thanks them for waiting and asks if they shall go. With his two companions, Inaba arrives at Ichigo Kurosaki's house, where Kon has been guarding Nozomi in Ichigo's body. They pursue the girl when she escapes out the window and Inaba injures her gut when he catches up with her, requesting that his allies kill Kon to finish the job. However, Uryū Ishida shows up at the scene.

Inaba evades Uryū's attacks and defeats the Quincy by using his Shikai. Turning his attention back to Kon, he realizes that Uryū is still alive and prepares to kill him. However, Orihime Inoue shields him and he is attacked by Yasutora Sado, whom he quickly defeats. Ichigo Kurosaki then arrives and fights Inaba until the Gotei 13 arrive. Inaba decides to retreat via a Senkaimon. When he returns to his lair, he announces that he will retrieve Nozomi via the use of his invading army.

The next day, Inaba once again addresses the reigai, outlining their plans. Captain Hitsugaya asks him what their next move is, to which he states that they must formulate a new plan before the Gotei 13 attempts to reform and return to Soul Society. He also explains that the Dangai has henceforth been sealed off, rendering communications impossible. Nanao Ise asks him what they shall do with the Captain-Commander, to which he states that he has something special in store for him. As Inaba leaves their presence, he tells them that their desires will become revealed once Nozomi Kujō is within their possession. Later, Inaba is walking through a dimly lit corridor lined with cells. He enters Ōko Yushima's cell and rests his lamp gently on the side table. He grasps the man's head, telling him that it is useless to run from him. He then laughs wildly.

He appears before Retsu Unohana and her lieutenant, eavesdropping on their conversation for several moments, before she calls out to him. Kagerōza applauds Unohana's deductive reasoning, admitting that her visit to the Daireishōkairo was unprecedented. Isane Kotetsu charges at him, but he disappears from that spot, appearing behind Unohana. Kagerōza then confirms to the captain that his abilities came about due to his Dangai research. She questions why he separated Soul Society from the planes of existence, to which Kagerōza states that they will understand his motives in due time.

As he senses the presence of the captains entering the Dangai, Unohana questions whether his plans will be destroyed due to their intervention. However, Kagerōza asks her whether she thought he would sit idly and allow them to enter. As Isane senses the captains successfully entering Soul Society, she notes the absence of Captain Komamura, to which Kagerōza comments that his technology is still incomplete as of this stage. He moves forwards, prompting Isane to release a Shakkahō spell at him. Kagerōza's voice echoes, commenting that she doesn't need to rush, as they pursue him. Kagerōza appears inside the underground storage chamber, flanked by the two Shinigami. Unohana tells him to stop this madness, as his plans will become fleeting, claiming that the death of the Captain-Commander is impossible. Inaba is told by her that he has underestimated the originals' strength, to which he refutes this. He claims that he merely cannot understand their objectives, primarily due to the fact that the affairs of others didn't interest him. Inaba asks whether the same could be said of her, prompting Unohana to ask what he means. He tells her that she will understand it in time, as Isane raises her sword against her.

Kagerōza comments that he would not have dreamed of facing off against a captain of her stature without proper planning. He explains to her that various Shinigami have been entering and leaving through the Senkaimon in Soul Society, stating that he modified it to allow for his plans to transpire. He explains further, claiming that he took Reishi samples from each Shinigami who entered the Senkaimon, thus creating Mod Souls identical in respect to their original counterparts. He states that that is how he created the reigai invasion force, as Inaba asks whether Unohana is able to understand. The blast door opens, revealing a reigai counterpart of herself, as Kagerōza claims that he has already sampled her Reishi, all thanks to Lieutenant Kotetsu. Unohana turns to face him, as Kagerōza Inaba asks tauntingly what her next move is.

As Unohana faces off against her reigai counterpart, she counters her attack, culminating in a huge explosion. The reigai Isane flinches from the attack, prompting Inaba to ask whether she is alright. As the reigai Unohana wonders where the original escaped to, Kagerōza explains that she is a wise person, and that she never aimed to fight them in the first place. Later, Inaba arrives at the prison, walking towards Yushima once again. He reassures Yushima, stating that Nozomi will return to Soul Society without fail. Inaba later observes Ichigo passing through the Dangai and meets him as he arrives in Soul Society. With his Shikai already released, he refuses to answer most of Ichigo's questions, saying only that he could not make a reigai of Ichigo as he is not a pure Shinigami. He then traps Ichigo inside the Dangai. Later, Kagerōza informs Yushima that Komamura's reiatsu has disappeared and that none of the captains have reached their location. He states that the other sources of reiatsu will disappear also.

Inaba once more goes to see Yushima as he flashes back. Later, Hitsugaya and Kenpachi encounter Inaba in a silo. Hitsugaya demands to know who Inaba is but Inaba just laughs. Kenpachi then says he only wants to know if Inaba is strong. Inaba laughs and says they have not realized that they have no chance of victory. Inaba releases his Shikai and Kenpachi says he does not know how Inaba is hiding his spiritual pressure but asks him to try and make it fun. The two captains attack Inaba and Kenpachi overpowers him initially and kicks him back. As Kenpachi goes to attack once more, Hitsugaya yells to him, saying that Inaba was waiting for something and Inaba then opens a portal to the Dangai. Kenpachi stops short and Hitsugaya attacks, prompting Inaba to open another portal. Hitsugaya then figures out that Inaba's ability is to manipulate space. The captains go on the offensive once more and as Inaba dodges, he begins to reveal the truth about his Zanpakutō in that it manipulates all space as he sends Hitsugaya's attack back at him. Kenpachi attacks but Inaba records the attack and sends it back at him when he tries again. Hitsugaya traps Inaba's sword, making it so he cannot record.

Hitsugaya strikes but Inaba unleashes Kenpachi's previous attack on him, revealing he can replay events as many times as he would like. As he goes to finish Hitsugaya, he is interrupted by the arrival of Suì-Fēng and Isane, carrying Akon. He is surprised that they escaped and is then confronted by Yoruichi Shihōin, who Inaba realizes freed everyone. Inaba tells her not to underestimate him but she says not to underestimate his adversaries as more captains arrive. Inaba commends them for doing so well but says they will not win. Everyone attacks but Inaba is guarded by a group of reigai that show up. The captains attack and manage to finally get to Inaba, cutting him and seemingly killing him. However, his body turns to dust and he reappears and cuts all those before him before jumping to the rafters. As he taunts them, he is stabbed by Mayuri who reveals he switched places with his reigai a while ago.

Mayuri informs Inaba that he switched places with his reigai once the reigai lieutenants made their way to the Human World. Inaba comments that, even though he was able to outsmart him, he is still at a disadvantage. Mayuri retaliates, releasing his extendable arm, proceeding to constrict Inaba. He is hurled around effortlessly by Mayuri, before breaking free from his bonds. Inaba asks whether Mayuri thought he could bind him with such an obvious attack, as the captain tells Inaba not to out step his place. Inaba realizes that he was waiting for Ashisogi Jizō and states it will not work but is soon approached by Mayuri as he is unable to move. Mayuri explains that he injected Inaba with a drug that stops thought processes and stabs Inaba. The reigai of Isane then comes to his aid, saying she will heal him but Inaba just laughs as he admits his weakness before striking Isane, killing her and taking the pill from the ash and swallowing it, forcing her into his body as he is forced out, no longer affected by Mayuri's drug. He then states that the science behind this is not exact as he appears behind Mayuri, knocking him back to the ground.

He knocks Mayuri back to the ground below, as the reigai proceed to join their master. Jūshirō Ukitake asks Inaba how he came across the illegal Mod Soul data hidden in the Dangai, as Kyōraku states that they will find out eventually. He asks Inaba who he truly is, to which Inaba reveals that he created mod souls and was a part of Project Spearhead. When the project was shutdown and everything was to be destroyed, he turned all the information into a special type of reishi and threw it into the Dangai. Inaba turns to Mayuri, stating that he agrees scientists fear oblivion and so he could not let his research be destroyed. Ukitake asks Inaba whether this is the reason why he aimed to resurrect Project Spearhead, to which Inaba confirms this, stating that his aim is to rule over Soul Society. Inaba thrusts his Zanpakutō into the air and the reigai's bracelets break, causing their reiatsu to surge as Inaba explains that they were all holding back. As more reigai arrive, Mayuri questions this and Inaba states that he could never create reigai of this caliber. As the Shinigami captains are overpowered by his Reigai, he laughs wildly, mocking their predicament.

An injured Inaba awakens from a dream. He goes to Yushima and asks him why he is worried. He tells him that everything is going to plan. Inaba asks if he is worried about Nozomi, saying that it is only a matter of time. Coughing up blood, he explains that he expected to be injured by the originals as they are not fools. He tells the man that he will see to it that the world will learn of his wish. Later, Inaba is working on restoring the imposters whose core was destroyed. The copy of Byakuya inquires what he is doing and then asks about Inaba himself. He states that he is recovering well and instructs Byakuya to tell the duplicates of Hitsugaya, Komamura and Kenpachi that they will soon being heading to the Human World.

Later, as the Reigai-Ukitake, Kyoraku, and Unohana attack Yamamoto in the World of the Living, Inaba suddenly appears to call off their attack. He reveals his plan: he wants Nozomi and attacks Yamamoto to achieve this. Ichigo begins to warn Yamamoto of Inaba's powers, but the Captain Commander states he already knows of them. Acting as a decoy, Nozomi attacks Inaba, who states that he will not fall for her abilities, but Nozomi reveals that she absorbed Yamamoto's reiatsu and attacks him with Arazome Shigure, forcing Inaba to copy the attack, barely surviving. Yamamoto and Ichigo attack with all their might, but Inaba uses Raikū's copied power of Aarazome Shigure to absorb both Ichigo and Yamamoto's attacks, leaving Ichigo's reiatsu depleted as he falls from the sky. Inaba then proceeds to attack Yamamoto with both copied abilities, but Nozomi gets in between the two.

Inaba voices his disbelief at Nozomi's attempt to defend Yamamoto. He voices his concern as the Mod-soul is pushed to her limits by the force of the attack, shouting for her to get away when he realizes that she has absorbed all she can. Nozomi refuses to give in, continuing to battle the attack. As Arazome Shigure begins to crack as it absorbs more and more energy, Inaba begs for Nozomi to stop as she'll die if she keeps trying. However, Yamamoto intervenes, meeting the blast with one of his own, causing a massive explosion that knocks both the Captain Commander and the master of the Reigai out of the sky.

As Yamamoto faints, Inaba struggles to his feet, grinning maliciously and voicing his relief that Nozomi is alright. As Rukia and Nozomi prepare to fight, Inaba chuckles and tells the latter that resisting isn't an option, as her Zanpaku-to is broken. He begins to advance, but Ichigo and Renji stop him. Ichigo tells Inaba that Nozomi doesn't want to come with him, to which Inaba responds by asking Ichigo why he said that. Inaba asserts that he is technically Nozomi's father, as he created the Mod-soul. He declares that the research is close to completion. Ichigo shouts that they won't allow that, and Kon adds that Nozomi would never be happy about that, to which Inaba replies that what makes him happy should please Nozomi as well. Ichigo tries to argue, however Inaba claims that he knows Nozomi best, so it is impossible that Ichigo would know Nozomi perfectly. Inaba reveals that he and Nozomi were made from the reishi of a single Shinigami. When Kon presses Nozomi for information, she just falls to her knees. Inaba notes that she hasn't forgotten. He reveals that if Nozomi were to fall into his hands, she and Inaba would become one and she'd be their enemy, so she kept her distance from him for this reason. Inaba asserts that Nozomi tried to push away everyone, but became attached to those who tried to protect her. He is Nozomi, and Nozomi is him. He then challenges them to ask Nozomi the truth of his statement. Ichigo, Rukia, Renji, and Kon attack, however, Inaba quickly defeats the four and steps on Kon's face. He then tells Nozomi to join him in going back to the place where they belong. After a terse moment, Nozomi refuses. Inaba narrows his eyes and calls her decision "unfortunate." He resolves to take her back by force, and advances. Nozomi attempts a strike at Inaba, but he catches her wrist and forces her to drop Arazomeshigure. Kon curses Inaba and throws his rock, hitting him in the back of the head, distracting Inaba enough to allow Nozomi to wrench her wrist from Inaba's grasp. Kon shouts at Nozomi to escape while he distracts Inaba, though he acts mostly as a pest than an obstacle. Nozomi slowly retreats; Kon wonders what she is waiting for and shouts at her to run. Inaba finally gets ahold of Kon and remarks that even though he is a Mod-soul, he is a failure. He hurls him underfoot and contemptuously mangles the Mod-Soul with his foot, resolving to "eliminate you completely from both the World of the Living and Soul Society." He finally forces Kon's Mod-Soul pill from his plushy's body and is about to destroy him when Nozomi suddenly blasts him with a Hado #58: Tenran and rescues Kon's pill and body before fleeing. Inaba attempts to follow, but is halted by a blast of fire from a barely conscious Yamamoto. Inaba angrily declares he doesn't have time to battle with the Captain Commander and uses Shunpo to chase Nozomi.

In the forest to which Nozomi flees, Inaba tries to grab her from behind. She uses Kon as a weapon and smacks him away, and suddenly the slope gives out from beneath Inaba's foot and he slides away. Later, Nozomi walks back through the forest, only to run into Inaba. Ichigo shouts for Nozomi to get down, and Inaba attempts to use Raikū but finds that it has vanished. Nozomi gets down and covers her head with her arms, and Ichigo unleashes all his reiatsu in a powerful Getsuga Tensho that completely obliterates Inaba. Ichigo then begins to tell her to come with him, but suddenly Inaba finishes with "to where we belong." Both people spin around to see Inaba laughing, and Nozomi wonders how he survived. Inaba reveals that back when the slope crumbled under his feet, he took a small precaution: Raikū can even copy Inaba himself. He created a decoy to ensure that they would waste their time with the decoy. He bids farewell to Ichigo and defeats the Substitute Shinigami with a single strike and then hand-knifes Nozomi in the back of the neck, knocking her unconscious as well. Inaba picks up Nozomi and opens up a time-space portal with Raikū, vanishing into it just before Kon arrives.

Inaba suffers from his injuries back in Soul Society while he makes preparations to fuse with Nozomi. Reigai-Nanao Ise suggests Inaba get treated, but he shoves her away in anger; insisting that he start the fusion between Nozomi and himself immediately, commanding her to make the preparations. Later on, he places Nozomi into a glass container and fills it with pink fluid; claiming that it is time to begin. When Reigai-Nanao voices her concern one more time before beginning the process, Inaba acknowledges the potential danger, but is convinced that should problems occur, he can control it with medication. With no more discussion, Inaba enters a second container and is submerged in the same fluid as Nozomi, delighted that his goal will soon be completed. After some time passes, the system finally completes its preparations and fuses Inaba with Nozomi. This unison ultimate resurrects Yushima as a Mod Soul with the combined powers of Inaba and Nozomi.

Despite restoring Yushima as a very powerful Mod Soul, Yushima's plans are ultimately stopped. In a final clash against Ichigo, Yushima is defeated, causing the the fusion to cancel out and restoring Inaba and Nozomi. As he dies, Inaba wonders if he was mistaken. Nozomi says a few last unheard words to him, before he dies.

Inventions
Reigai: He is seen to have various reigai stored in a room. He is also known to have manufactured reigai look-alikes of several Shinigami lieutenants and captains, as well as the reiatsu-limiting bracelets that they possess on their forearms. According to Urahara, he also has made a special Reigai, which he himself wears, which seals off his reiatsu, allowing him to enter the Kōtotsu without dying.

Powers and Abilities
Scientist & Inventor: As a member of the Shinigami Research and Development Institute, Inaba has demonstrated remarkable intellect. With his scientific knowledge, he is able to create reigai duplicates of several high-ranking Shinigami. He is very insightful, able to quickly understand the situation for what it is and to quickly comprehend the nature behind his opponent's technique. He is a expert of the Dangai as well.

Expert Swordsmanship Specialist: Inaba has demonstrated remarkable skill in battle. His fighting style is fluid and precise, able to quickly change his attack pattern to suit the situation. With his Zanpakutō he was shown to able to defeat Rukia Kuchiki and Renji Abarai simultaneously, as well as fight evenly with the likes of Ichigo Kurosaki and Genryūsai Shigekuni Yamamoto.

Shunpo Expert: In battle, Inaba has demonstrated considerable speed and efficiency in Shunpo. During his battle against Uryū, he is able to effortlessly dodge all of the Quincy's arrow attacks.

Kidō Practitioner: He is quite skilled in using Kidō as he is able to bind Kon with a mid-level Bakudō without saying the incantation.

Modified Spiritual Energy: While only a 7th Seat Officer, Inaba has shown considerable spiritual energy, able to compete with Ichigo's Bankai and Hollow mask (albeit Ichigo's power was greatly weakened). A unique trait of his Mod Soul nature allows him to completely conceal his reiatsu, prevent others from detecting him. It also allows him to freely move about in the Dangai, even able to safely pass through the Kōtotsu to regain the Mod Soul data.

Dangai Manipulation: As a result of his extensive research upon the Dangai, Inaba has gained the ability to alter space. He has used this ability to travel from the Human World to Soul Society, as well as to manipulate the Kōryū and Dangai. According to Kisuke Urahara, however, his abilities do not extend to control over the Kōtotsu.

Hakuda Practitioner: While never used in actual combat, Inaba showed enough skill to knock Nozomi out with a single chop to the neck.

Zanpakutō

 * In its sealed form, Inaba's Zanpakutō takes the form of a silver cane. The handle of the cane is dark blue and curves around to meet the shaft.


 * Shikai: Raikū is released with the command, . When released, a yellowish green light wraps around the cane and transforms it. The cane turns into a double-headed voulge with red markings on it. Inaba’s Zanpakutō can also control the Reigai’s Reiatsu-Limiter bracelets on their forearms, allowing him to break them at will, as well as to increase their surge in reiatsu.


 * Shikai Special Ability: Raikū has the ability to manipulate space. This is performed by spinning Raikū which produces a bell-like chime before activating.


 * Space Manipulation: Raikū is also capable of creating portals to connect with the Dangai. It can also be use to drag opponents into Dangai. By twirling Raikū to the right, these portals are also able to negate attacks and record the information to recreate the space as he desires. This power to replicate can extend to various events: an opponent's attack, movements, even their Zanpakutō attack or attributes.  This ability can only be used from one direction at a time. It also can be very taxing on Inaba's energy-reserves from constant use. Twirling Raikū to the left, Kagerōza's Zanpakutō calls forth a portal that manifests the recorded event, which he is capable of doing as many times as he pleases.


 * Clones: Kagerōza has demonstrated the ability to use his Zanpakutō's recording ability to record himself, thus producing a clone of himself. Unlike when he clones another person's abilities, the recorded version of him can act independently until it is destroyed.


 * Space Displacement: While appearing to freeze time, by using these portals on himself, Kagerōza can in reality relocate himself instantly. With no warning to his new location, Inaba can attack his opponent off-guard.


 * Bankai: Not Achieved.