Histoire's appearance is similar to her look in Hyperdimension Neptunia but with differences, her height being one of the most noticeable factors. Her hair remains in two blonde pigtails at medium length along with the purple and orange headdress but this time it accompanied by a hat with the letter N in the center. Her dress seems similar to the original but is open shoulder and has a teal tie. Her leg-wear consists of thigh high socks and white shoes with green circles wirh a black lining on the center.
Histoire's personality is very mature and serious. She does not play around and is very focused on her work as an Oracle. She has to frequently nag Neptune to do her duties as Console Patron Unit (CPU) and will go so far as to yell to ensure she gets her point across. While she is very hardworking, it sometimes takes her a while to provide people with the information they seek (3 hours, 3 days, etc.).
When Nepgear succeeds in not only obtaining the mascot characters but the getting the CPU Candidates as well, Histoire creates a Sharicite crystal and sends them to the Gamindustri Graveyard. Histoire wonders if she is repeating the same mistake three years ago, but the mascots cheer her up and tell her to place faith in them.
Nepgear successfully brings back Neptune and the other CPUs and they are allowed to finally rest in the Basilicom. Histoire eventually ends up getting kidnapped by CFW Trick and Underling at a point but is quickly rescued by Nepgear, Neptune, and the others and she blames herself for it happening.
At the end of the game, Histoire is shown looking for Neptune who has gone missing and has left her paperwork all covered up in cookie crumbs. Nepgear who is done with her work goes out to look for her at the spot where they used to play at as children.
Nepgear and Neptune decide to play and relax, much to Histoire's annoyance.
After Nepgear kills Neptune with the cursed sword, Histoire arrives. Histoire tells Nepgear that she doesn't need to explain her actions, as Neptune had told her before taking her out for a walk. The two mourn Neptune's death.
Later on, when Arfoire vanishes from Gamindustri, Histoire prepares for Nepgear's ceremony to become a CPU.
After Neptune gets enough shares from the Ultra Dimension Planeptune, Histoire opens a portal. Unfortunately, Nepgear was too eager to see Neptune again and accidentally goes through the portal, causing both of them to be stuck in the Ultra Dimension. When they open the portal again to bring back both the Planeptune sisters to deal with the Hyper Dimension Rei, Plutia glomps Neptune and as a result, Nepgear is stranded in the Ultra Dimension.
In the true route of the game, the portal was much more larger then expected. Histoire concludes that the portal will stay open for an indefinite amount of time and that people can come and go as they please. Histoire briefs the CPUs of their current situation. After the Hyper Dimension Rei is defeated, the portal still remains open and Histoire talks with her Ultra Dimension counterpart.
Zero Dimension Neptunia Z: Twilight of the Desperate CPU
Histoire begins her day like any other, lecturing Neptune and Nepgear on the piles of issues Planeptune faces. The current issue is the CPU Shift period where faith in the CPUs is at an all-time low and rumors are rampant. However, the sisters pay no attention to her lecture.
The sisters then disappear into another dimension. Histoire has constantly tried to contact them and when she is finally able to, she feels relief and surprise that Neptune is already aware of the fact. Histoire is introduced to Uzume Tennouboshi and Umio and she thanks them for assisting the sisters. Histoire also notes that Uzume looks like an old acquaintance of hers.
She then starts to have a wonderful conversation with Umio. Neptune and Uzume notes that it feels like parents are talking. Afterwards Histoire says the sisters can return with the use of a transfer terminal, shares and Nepgear’s N-Gear.
Histoire plans to work Neptune like a dog to recover the lost shares but Nepgear promises to help her sister. Luckily for Neptune the transfer fails as the terminal needs some repairs. Nepgear says she will re-contact Histoire when the terminal is working.
Nepgear contacts Histoire as the terminal is repaired. Neptune expresses her desire to stay due to not wanting to have Histoire lecture her. Histoire suggests that Neptune can stay and Nepgear can go back home and take her place as CPU. Neptune apologizes. Uzume then offers a share crystal to act as the power supply for the terminal as thanks for everything.
Nepgear actually wants to stay to help Uzume. Histoire wonders if Nepgear has been influenced by her older sister. Histoire notes that Nepgear was her last hope. Without her diligence, she would be unable to face her predecessors. Nepgear clarifies her intentions and wants to help Uzume so that Uzume can follow them to Planeptune. Uzume refuses and tries to explain but Arfoire attacks.
The group goes out to confront her. They retreat and Histoire readies the transfer. She was only able to bring Neptune back. Neptune arrives expecting a combination of "Welcome home" and lectures. She finds a Histoire quickly losing consciousness. Histoire welcomes Neptune with the message that she did something above her specifications and falls unconscious. IF arrives and the two bring Histoire to another room to rest. Compa arrives and they discover that Histoire has short-circuited and needs Sanshiro's Soulful Patch to fix her up.
Neptune acquires the cartridge patch and puts it in Histoire's mouth. She starts to reboot and repair herself.
While Histoire was short circuited, she had a dream regarding someone unable to control her powers. This person wishes to be forgotten but Histoire tries in vain to stop her.
Histoire has finished restarting. She along with Neptune lend Planeptune's shares to assist Nepgear, Uzume and older Neptune with their climatic battle against Arfoire fused with Dark Purple. The support paid off, and the two Neptunes, Nepgear and Uzume were able to defeat Arfoire and save the Zero Dimension.
Histoire runs Planeptune to best of her ability after the rewrire. She worries about whether she can see Neptune once again. Luckily, Neptune shows up in the Basilicom making lots of noise. Histoire brings Neptune in the back to update her on situation of the world.
Hyper Dimension Neptunia G: The Golden Leaders, Reconstructors of Gamindustri
Histoire runs Planeptune to best of her ability after the rewrire. She worries about whether she can see Neptune once again. Luckily, Neptune shows up in the Basilicom making lots of noise. Before the guards can kick her out, Histoire brings Neptune in the back to update her on situation of the world.
Gamindustri has been rewritten in a way that no one remembers the CPUs and it is as if the Gold Third has always ruled. Due to this, many factions are seizing power and starting small skirmishes that grow in scale. War between nations is inevitable. Additionally more monsters are spawning, some of them are mutating to "delusionary" monsters. Those monsters attack indiscriminately. Neptune then notes that all the non-believers that thought CPUs were useless were wrong, as under their rule, none of this could have happened.
Histoire agrees, but the biggest issue is a secret organization. Neptune asks her if she is taking about AffimaX. Histoire wonders where she acquired such information. Neptune says she found it on N-Chan. Histoire worries about a leak of information but Neptune assures it is just N-Chan so nothing is leaked. The group is involved with stealing and selling business and technology information. They are a huge part of the chaos in this world. Neptune then wonders where the Gold Third in charge of Planeptune is. Histoire says B-Sha is out.
Histoire laments that all the rulers of Planeptune are lazy then realizes, she can assign Neptune to B-Sha's job. Neptune has no excuse as Gamindustri is in a legitimate crisis. It is time for her to uphold her duty as CPU. Neptune decides to follow IF since she already is tasked with stopping AffimaX's activities. Histoire asks her if that is okay since IF can't remember her. She worries about it being painful. Neptune admits that it is but IF is the most reliable in crises and heads out.
Histoire reappears to ask Neptune, IF, Compa and B-Sha to head out to Haneda City to deal with a horde of delusionary monsters. B-Sha worries about Planeptune but Histoire assures Planeptune is made to deal with long absences with their rulers. The girls leave and Histoire soon hears good news, they have taken care of the monsters.
Neptune, IF and Compa return to report their results in Haneda City. Some people remember Neptune besides the group. Histoire is shocked that there are people that do remember Neptune. They also tell her about B-Sha's desertion. Histoire has no idea why she would do this since B-Sha was an eager hero. Histoire also tells them she has no idea where B-Sha is.
Eventually, Neptune finds and makes up B-Sha. They have agreed to split their role, B-Sha takes care of public security and Neptune defeats monsters. It works but Histoire is unhappy to find both girls slacking on their duties to run the country. She tries to scold them but is ignored by the pair of slackers.
IF then gives a status report on the new arrangement of the country. People love the new arrangement and memories of Neptune are returning but there are still bad rumors on the internet. Neptune wants to combat the bad rumors of her going out, by her staying in to slack off more. Histoire wonders how she came up with that conclusion.
Histoire eventually shows up after the commotion of giant Warechu and B-Sha settled down. She decides to offer Warechu a delayed sentence and no ten billion credit fine for the destruction he caused in Planeptune if he offers help in researching the delusionary monsters seeing as how he turned into one. To make the offer more attractive to Warechu, she adds that Warechu can be in the Basilicom where he will get nice meals from Compa everyday. Warechu happily agrees to this.
Histoire is happy to wrap things up but Neptune lost the Swirl Console. Histoire says they will retrieve this when they are ready to take on AffimaX. Histoire sees Chuko visiting Warechu and teases her for her obvious attraction to the rat.
Histoire recieves IF's intelligence report. AffimaX is responsible for the chaos in the Gamindustri rewrite. They have assisted the Order in Lastation, the Revolutionary Army in Lowee and some schemes in Leanbox. She thinks the time to attack AffimaX is now. They know that AffimaX is on the battleship and Histoire sends Neptune, IF and Compa out to gather the CPUs while she gets help from an acquaintance to find the battleship's location.
Neptune returns with the CPUs who report that AffimaX guided their respective problems with a few members. With that they can conclude that, Warechu, Arfoire, the other Neptune, Steamax, and a mysterious girl is a part of AffimaX. Histoire has figured out the location with the acquaintance's help. She orders them to get to the battleship and stop AffimaX but they should be careful as this is an enemy that can rewrite the world.
When they leave, Histoire has a bad feeling about this. This is shared by B-Sha. The rest of the Gold Third also arrive and share that feeling. They report that the power that has affected all of them is the opposite of Share Energy. It is Negative Energy and can nullify Share Energy. Since the CPUs do not have share energy, they will likely lose. However, S-Sha has a solution.
The Gold Third cannot use Share Energy like the goddesses can. As a result, they have the Golden Summit to collect faith and the Gold Crystal to convert it to usable energy for the Gold Third. Even the shards of such a crystal holds considerable energy. S-Sha wants Histoire to use it to create a Share Crystal. That Share Crystal will give the CPUs access to shares they don't normally have access to.
With K-Sha, C-Sha and S-Sha's Gold Crystal Shards and B-Sha's Gold Crystal, she creates the Hyper Share Crystal. She entrusts the Gold Third to deliver it to the CPUs.
Histoire later congratulates the girls on a job well done as AffimaX is defeated. She notes that the Gamindustri Rewrite was literally cut down. Neptune is proud of her accomplishment and can't wait to tell everyone so she can gain fame, shares and pudding. Everyone decides to keep it a secret to protect her from the problems fame causes. This saddens Neptune.
Histoire appears in the epilogue interupting Neptune's prank on Nepgear and Uni. Neptune then asks about how the Hyper Share Crystal came to be. Histoire explains it to Neptune who feels thankful for the Gold Third's help.
Later alarms blare and Histoire alerts Neptune to the hole in the sky.
Heart Dimension Neptunia H: Trilogy Finale: Into Legend
Histoire tasks the CPUs with investigating the hole in the sky to ease any concerns the citizens may develop. The CPUs agree but Nepgear and Uni want to tag along of which Neptune and Noire tell them to stay behind.
During the investigation, the CPUs get captured. Nepgear and Uni return with the news. The candidates want to go to the Zero Dimension to rescue their sisters. Nepgear wonders if they can make a portal using shares, but Histoire says without the CPUs, there are not enough shares. However the Swirl console allows for travel between the Hyper Dimension and the Zero Dimension. Histore can easily make a gate with it.
Histoire advises the candidates to get the Gold Third for assistance and then she will open the gate. She also lets IF and Compa assist the candidates. When the rescue mission returns with the Gold Third members, Histoire creates the portal to the Zero Dimension. The rescue mission departs. Histoire notes she must begin her own preparations as there seems to be some dimensional fluctuations. She fears that this is a bad omen.
Histoire has managed to convince Affimojas and Steamax to work for her with the use of figurines and pictures of Vert. In addition, Histoire makes arrangements for the relocation of the Swirl Console.
Nepgear and the others return to the Planeptune Basilicom. Histoire is happy to see Nepgear and asks where the CPUs are. Nepgear explains her adventures and Kurome's plan dimensional fusion to her. Histoire is shocked that she could forget the true history despite being the one who must record Gamindustri's history. Histoire says that she cannot look at the predecessor CPUs.
Kurome arrives to say that it is okay as it allowed her plan to proceed without problems. She asks for the main console back. The peripherals that she got from AffimaX are the keys to freeing her but without the main seal, it is worthless. She threatens them for the console. Affimojas arrives to ask her if she thinks she can leave here alive. Steamax asks if Uni is okay.
Kurome asks Affimojas how much he was paid to switch sides. Affimojas says money is money but there was something more valuble he got. He got figurines and pictures of Vert. Nepgear is shocked that Histoire would pay him with such products. Histoire explains that all the products were legally sold in Leanbox. Kurome finds it amusing that fetishes trump money. Affimojas tells her that should be obvious as money is only used for your hobbies. His true goal was to get money to buy all products related to busty blondes.
Nepgear cannot believe that the motivations of a final boss for the Hyper Dimension arc could be something so crazy. Uni asks Steamax if that was his plan. Steamax begins to deny this but Affimojas says Steamax has strayed from the school of Busty Blondes. He is now mastering the School of Black Haired Side Updo Tsunderes. The candidates wonder if he means Uni.
Uni is in shock. Steamax tries to explain himself but Uni says he is the worst. Steamax begins to cry. Uni is annoyed by his troublesome personality and clarifies that she does not hate him. She was embarrassed as people don't look at her as the way they see Noire. She tells Steamax to cheer up.
Kurome is getting a headache over the fact they can be so carefree in front of her. She demands the Swirl Console again. Affimojas tells her that she will not get it here and wonders why she thought it would still be at the Basilicom. They have relocated it so her plans will not come to fruition today. Steamax says that it is unfortunate for her.
Kurome thinks it is annoying but seeing as the console is not at the Basilicom, Kurome decides to leave. She tells them to watch Gamindustri burn as she searches for the seal. She leaves. Histoire is glad she let them go. K-Sha is concerned with what she meant with watching Gamindustri burn. Histoire gets a call and says she will send Nepgear and the others right away. Nepgear wonders what is happening. Histoire says a Dark CPU has suddenly appeared. C-Sha now understands what Kurome meant. A Dark CPU can certainly make Gamindustri burn in a flash. Nepgear and the party make their way to the Dark CPU to stop it.
During the party's mission the information about the console's location was discovered by Kurome. She stole it from the Basilicom staff within their nightmares. Histoire makes a call to Nepgear. Nepgear answers saying they were just going to report back about their success with the Dark CPU and wonders what is up. Histoire says it is an emergency and Kurome Ankokuboshi has found the location of the Swirl Console.
C-Sha asks her who was it that spilled the beans, Affimojas or Steamax? They were probably bribed with a bunch of dojunshi. Histoire answers with none of them as the information was stolen from the Basilicom Staff in nightmares. C-Sha apologizes to the two of them. B-Sha says there is no need to apologize as while the robots look cool on the outside, inside, they are weird. Histoire transfers the co-ordinates of the location and tells them to hurry.
Histoire creates a portal for the party to return to the Hyper Dimension with. They defeated Kurome but she decided to send a massive monster horde to destroy the Hyper Dimension in retaliation. Neptune asks Histoire what is the current status of the monster horde. Histoire reports that the monster horde is heading south and growing. It is only a matter of time until they reach the Hyper Dimension. Nepgear notices the Swirl Console breaking. Umio comes in and reports that he has all the monsters of the Zero Dimension and kept his promise to Uzume. Neptune tells Uzume not to break and that she will save her. She asks that Uzume does not break but the console breaks disappearing in a beautiful light. Neptune cries.
A few days have passed and Umio has finished preparing the tea asking Histoire to rest. Histoire thanks Umio and plans to go on break soon. Umio asks Histoire about the Planeptune sisters. Histoire explains that the sisters were depressed but they are starting to return to their normal selves. Histoire wonders about Umio. Umio cannot believe that Uzume has disappeared and feels she will show up somehow. Either way he does not have the luxury to mope since he has to take care of the Zero Dimension monsters.
Histoire assures him that everything will turn out well and asks if Older Neptune has going touring today as well. Umio tells Histoire that she is Lowee trying out the new Blanc manjus. Histoire comments on how both Neptunes have a sweet tooth and asks what is the blend for the tea today. Umio says it is his own personal blend that he is proud of and Uzume and fond of.
Histoire learns of the fact that a monster horde is coming to the Hyper Dimension. Since, Neptune has chosen to save Uzume, Histoire does her best to prepare Gamindustri for a massive defensive battle against the horde. Once Neptune makes it Affimojas' ship, she begins to worry about the horde. Histoire calls in to tell Neptune that counter measures have already been put in place. Nepgear is surprised to see Histoire. Histoire reports that all of the military of each nation and volunteers are currently fighting a massive defensive battle. She allows the CPUs, Gold Third, S-Sha's Dogoo servants, IF and Compa to say their piece to Neptune.
Noire tells the girls to show her some respect. She never thought that she ever had to amass and deploy all of Lastation's soldiers. K-Sha adds that the Order's retirees were also asked to help and they were eager to oblige. Neptune is surprised that the Order had retirees. Blanc reports that Lowee's soldiers will be arriving at the fight soon. C-Sha adds that the guild hunters are also in this. Vert reports that all of Leanbox's soldiers are deployed. S-Sha adds that they number 1000000 and that she never thought they would be used for this. Dogoo Lady corrects S-Sha with the fact that they are all formerly soldiers, now they are ran-pigs all 1000000 of them. Dogoo Man adds that his clan is helping out. Dogoo Man has trained his muscles for this. Older Neptune asks if that means there are more Dogoo Man. B-Sha announces that Planeptune's preparations are ready and assures that they will push back the horde. IF tells Neptune to be thankful. All of Gamindustri is mobilized just for her desire to save Uzume. Compa ends it off with the fact that she, Warechu and Chuko will do their best. That means Neptune and Uzume better do their best.
Neptune is moved by their efforts. IF tells her to save Uzume. Neptune agrees. Afterwards the rest of the CPUs, Gold Third, IF and Compa decide to head back to the Zero Dimension to assist Neptune and the others as Kurome was spotted.
Afterwards the party returns to Planeptune. Neptune announces to Histoire that they are back and everything has been settled. Histoire thanks them for all their hard work and reports that she has observed the disappearance of both the Zero Dimension and Heart Dimension. Umio and Neptune accept the fact that Uzume is gone. Histoire thinks it is too early to give up and decides to release Uzume's seal. Neptune protests as Uzume is already dead. Nepgear thinks it is better to let her rest in her seal instead of going through the trouble to unseal her.
Histoire thinks it is not like Neptune to give up so easily. She asks her if she is against the unsealing if there is a chance it will save Uzume. Neptune is shocked that they can still save Uzume. Blanc wants to know how as no one remembers her. Even if the revival was successful, how do they assure that Uzume is resurrected instead of Kurome. Histoire answers that she does not know how but everyone in Uzume's era has now remembered her. The records are restored as well. Histoire has conducted a survey and most people are happy with that time. In addition, some want to return to that time.
Neptune feels the blow and is happy for Uzume but feels conflicted. Histoire admits that she has no way of assuring whether Uzume or her original personality corrupted by negative energy will return. In fact, it is more likely Kurome will return. That being said, with the Visual Radio, there is a chance Uzume will return. Nepgear asks Histoire for assurance on this. Histoire tells her that the Visual Radio is proof of Uzume's adventures in the Zero Dimension. In addition, Histoire feels something coming from instead the Visual Radio. It is not Share Energy but she feels it is the trigger for her real personality to revive.
Older Neptune asks Histoire if that is just a desire instead of a theory. Histoire admits that it may be because she spent time with her but she does hope the Visual Radio can bring Uzume back somehow. Older Neptune tells her not to get the wrong idea and she supports this too. She wonders if Neptune is okay with this. Neptune says she will take any chance as long as Uzume can be saved. Nepgear believes that it is possible if enough people hope for it. A miracle can happen. Neptune is ready for the miracle. Umio hopes that Uzume is the one to revive.
Histoire asks if everyone else is okay with it. Noire says there is no need for an answer. The people of Gamindustri came together because of their desire to save Uzume. If they cannot save her then it is the same as letting the people of Gamindustri down. Vert says she and Blanc feel the same way. C-Sha says the Gold Third are also fine with it and did not need to be asked.
Histoire explains that she will connect the peripherals to the console which is called the "main seal". Uni remarks that while this is a revival ritual, it is surreal in how it looks like she is just starting a console. Histoire adds that normally she would press the power button and release the seal but she will attach the Visual Radio first. Nepgear notices that the Visual Radio is showing Uzume's mark. Histoire then releases the seal and asks that Uzume receive everyone's prayer.
Uzume revives and announces that she accepts her existence. She apologizes for keeping everyone waiting. Neptune, Nepgear and Umio are glad to see Uzume. Older Neptune was worried as she thought Kurome had revived when she first heard her voice.
Histoire announces that the revival was successful. Her appearance and speech pattern have changed but Histoire says it feels nostalgic. Uzume is grateful that she is here thanks to everyone's wishes. She thanks them and is glad to be back home in Gamindustri.
A few months have passed and Histoire narrates what has happened. The Heart Dimension and Zero Dimension have returned and are now an independent dimension. The monster horde has been defeated by military of all nations and local militia. Peace has returned to Gamindustri, the CPUs have returned to rule their nations and the Gold Third who ruled in their stead are remembered as heroes.