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The Yotsuba Clan is one of the two most influential and strongest houses in the Ten Master Clans. Bearing the number Four in their name, it is a Clan where its members' lives are shrouded in secrecy. The current Head of the Yotsuba Clan is Yotsuba Maya. The next heir of the Yotsuba Clan is Shiba Miyuki and Shiba Tatsuya being her fiancé.[1]

Despite the system of checks and balances to prevent the possibility of Magicians losing control of themselves, placed by the creation of the Ten Master Clans, the Yotsuba Clan is gradually becoming too powerful, even among the powerful Ten Master Clans. With Shiba Miyuki, Shiba Tatsuya, and Yotsuba Maya existing in the same family at the same time, it is believed that the Yotsuba may become an existence that will eclipse the Ten Master Clans. Their ever growing power and influence has caused other Ten Master Clans to be wary of their growth and status to the point that some of the other Family's are trying to weaken them by any means possible.

“	In terms of numbers, the Yotsuba Clan were plainly outnumbered by the Saegusa and Ichijou Families. Yet, their combat prowess were comparable. In 1 on 1 confrontations, the Yotsuba would have the advantage. Despite their limited numbers, they were more than capable of becoming the counter-terrorism trump card of the government and carry out any action that went beyond the reach of the law that the government needed. In terms of black ops and assassinations, none among the "Numbered Families" could match the Yotsuba Clan. ”

—Volume 11, Chapter 14

The Yotsuba and the unique magic they possess originated from the Fourth Institute, the laboratory that created them and is now controlled by them. Their ancestors were magicians with strong mind-manipulation abilities that were selected and gathered together by the Fourth Institute in order to be strengthened and have their primary field of their Magic Calculation Area directly modified as part of their research focusing on "endowment and improvement of magical abilities given by the mind's structure for the usage of Mind Manipulation Magic."

The "Yotsuba" that were produced at that time inevitably descended from two types of magician lineages. The first lineage was one where a person was born with a Mind Manipulation Magic that was strengthened. The other lineage was one where a person was born with a Magic Calculation Area that is warped by a strong power. These two heritages stand side by side and mix to form the Yotsuba known today. Even those who share the same blood display the two traits randomly. For example, Shiba Miya inherited the traits of the former with Mind Structure Manipulation, a form of Mind Manipulation Magic that only she can use; Maya represents the latter, as she did not acquire any form of Mind Manipulation Magic, but instead a distinctive power from birth. [2] As for Shiba Miyuki, it seems that she possessed both traits in her power as shown from her abilities of Cocytus, Niflheim, Inferno, and etc.

The Yotsuba Clan is the only family in the Ten Master Clans and 18 Assistant Houses that originated from the Fourth Magic Institute. There are other family's which have the Number 'Four' in their name, such as ‘Yomo’, ‘Shihoudou’, and ‘Watanuki’ but they don't belong to the 28 Houses. [4]

The Yotsuba are sponsored by a hidden Sponsor who holds considerable influence over the Fourth Research Institute to this day, and whose intentions and requests are regarded highly by Yotsuba Maya and Hayama. [5]

“	"I know what you want to say, Hayama-san. I have no intention of causing discord. I only do this because I believe that obtaining a 'Parasite' is necessary for the Yotsuba."

"Does Madam believe then that studying the Parasite, will bring us closer to the mysteries of Mental Interference?"

"Yes. Just what exactly is the mind, is a question the Yotsuba have been endlessly pursuing. It's said that the Parasites are individual mental information bodies. Information on substance, structure, location......even if only a little, it should give us hints as to the true nature of the mind."

”

—Conversation between Maya & Hayama

Area of InfluenceEdit

The Yotsuba Clan's influence encompasses specifically the Tōkai region and both the Gifu and Nagano prefectures. During the Master Clans Conference held every four years, the Head of the Yotsuba Clan gives a report on the status of the regions it monitors. [6]

The Yotsuba's influence throughout Japan is powerful and vast enough to allow the Clan to systematically alter every personal database at the civilian level, a feat that requires exceptional clearance at the highest level, which showcases how their influence is deep enough to intervene even at the highest level of government. [7]

Also according to the rumors, the Fourth Research Institute was set up by an independent non-government sponsor which has strong influence and power in nations. [3]

It was noted that the Yotsuba only use their power from personal connections, only for self defense and retribution. It seems that they have no lust for power. [8]

SecrecyEdit

The Yotsuba Clan keeps itself shrouded in secrecy and out of the public's eye unlike the Saegusa Family. [9]

It is greatly implied that due to the extreme secrecy surrounding the Yotsuba Clan, the general public doesn't know which Magicians are connected to the Yotsuba Clan. It is implied that the only publicly known Magician from the Yotsuba Clan is the current head of the Yotsuba Clan; Yotsuba Maya. As of Volume 17, Shiba Miyuki and Shiba Tatsuya had been publicly announced as members of the Yotsuba Clan.

It is strongly implied that most Magicians related to the Yotsuba Clan don't use "Yotsuba" as their family name but instead use other family names in order to disguise their identities. Also, it is implied that when a person becomes the Head of the Yotsuba Clan, their family name would be formally changed to "Yotsuba".

From a policy of independence if portrayed positively, or the policy of being self-centered, if portrayed negatively that the Yotsuba adopted, they have always adopted the stance of not caring about what other Houses do. It has been stated by Katsuto that because of the high level of secrecy surrounding the Yotsuba, nobody knows what they've done or plan to do. [10]

VillageEdit

The mountain village where the Yotsuba reside, is in a narrow valley not recorded on any map, which is in the old Yamanashi Prefecture that bordered the old Nagano Prefecture. [11] Due in part to the village not being recorded on any map, it has no designated address for receiving delivery's. The Kobuchizawa Station is the nearest station to the village, for a vehicle to come and pick up visitors. [12]

There is a tunnel that leads to the entrance of the village. Inside the tunnel are branches of a pathway with a mechanism that needs a flow of Psion waves in a certain waveform at specific points in order to be able to stay on the route which leads to the Yotsuba's Village. The tunnel provided an automatic gate of Non-Systematic Magic. The mechanism essentially cuts off the village from the outside world, by land transportation. [13]

A barrier surrounds the village to repel intruders, and it can easily be decomposed by Tatsuya's Decomposition. The catch is, if until the barrier is rebuilt by Magicians with recognition inhibitors, they'd be overworked day and night because doing so isn't a simple task. [14]

In the center of the village lies a conspicuously large single-story Manor, the Yotsuba Main House. [15]

ResidenciesEdit

In Tokyo, the Yotsuba have a safe and secure residence for Tatsuya and Miyuki to use that was prepared for them. [16]

Near the Main House, there is a complex which is the residence of the Kuroba Twins' grandmother, Yotsuba Yume, younger sister of Yotsuba Genzou, Tatsuya and Miyuki’s deceased grandfather, as well as aunt to the current Clan Head, Yotsuba Maya. [17]

Main HouseEdit

The Main House conceals the address of the Old Fourth Research Institute. Due to the high confidentiality of the Old Fourth Research Institute, only the name is known, and the address is not known even to the highest government and military officials. As the Yotsuba Clan had inherited the facility, they went around literally erasing the memory of anyone who knew this secret, completely hiding the location. [13]

The Main House is a rather large building done in the style of a traditional Samurai residence. A description of an outsider's impression of the Yotsuba Main House as seen from outside of the gate. Compared to a typical residence it is certainly spacious. Even calling it a mansion does not feel like a misnomer. However, someone who looked at the grand mansions of those like the Saegusa Family and Ichijou Family would probably be rather surprised by its simple snug appearance. The Yotsuba do not care about the spaciousness of their house. Because the Yotsuba Clan, who maintain a systematic policy of secrecy, would never invite a large number of outsiders as guests. Perhaps they think a grand mansion would only be an encumbrance. [18]

In contrast to the Eastern style of architecture for the exterior of the house, the big reception room is done in the Western style. There are even paintings of landscapes adorning the brightly hued walls, not reproductions either; but rather, these were original oil paintings. And the stately natural wood table in the middle of the room could easily seat over ten people. [19]

The Audience Chamber gives off the impression of emptiness. This was possibly due to the fact that, instead of the space being occupied by the legs of over ten chairs, there are only the four legs of a sofa placed by a table; also, aside from the table and sofa, there are almost no furnishings, which appear to leave all too much space leftover in the room. Making the room feel unnecessarily vast was probably for the purpose of psychologically inducing a feeling of oppression. [19]

MembersEdit

Based on the fact that they possess unique abilities unmatched by other families and have a select few but extremely powerful group of Magicians, the Yotsuba Clan is a special entity within the Ten Master Clans. [7]

Unlike other families that possess similar magic that is inherited through blood relations, the Yotsuba Clan doesn't have Magicians that possess similar abilities, but instead unique ones. [9]

While possessing an aptitude for having Mental Interference Magic is an important quality for the Yotsuba Clan Head to have, it isn't an absolute condition. Up to the previous Clan Head, Yotsuba Eisaku, he was highly versatile in Mental Interference Magic, but Miya who had the powerful ‘Mental Design Interference’ Magic hadn't been selected to be the next Clan Head, instead Maya was chosen. [20]

The 28 Houses were originally conceived to be Side Branches that stem from the development of Magicians, however, the Yotsuba Clan are the only ones to have adopted a Side Branch System. [21]

Families :

Yotsuba (Head Family)

Shiba - (Elder)

Shinonome ( - (Elder)

Mashiba ((Branch Family)

Shiba ( (Branch Family)

Shiiba (- (Branch Family)

Kuroba - (Branch Family)

Shizuka ( - (Branch Family)

Shibata ( - (Branch Family)

Mugura ( - (Branch Family)

Tsukuba (- (Branch Family)

“	In regards to the secret feud between the Yotsuba and Dahan; on the Yotsuba side, there were thirty dead. From this war, the Yotsuba lost the head of the Clan and half of its fighting strength. On the other side, Dahan's dead were approximately four thousand. For the sacrifice of a mere thirty people, the Yotsuba Clan assassinated four thousand: cabinet ministers, high class bureaucrats, officers, magicians and researchers; as for the continent of Asia, it had all its research results on modern magic annihilated.

Due to this damage, Dahan suffered an internal collapse after one year and the Great Asian Alliance unified the continent of Asia. As for East Asia, the antagonism between the North and the South came to a resolution; as for the northern hemisphere, a resolution for the world wide border conflicts was jury-rigged. It was the end of World War III. And among those who knew the truth about the collapse of Dahan, the Yotsuba were feared as "Untouchable".

”

—Volume 8, Untouchable - The Nightmare of 2062

The Yotsuba Clan currently possesses one of the strongest Magicians in the modern era. Yotsuba Maya is known throughout the world as the "Demon Lord of the Far East", the "Midnight Queen", and is the current Head of the Yotsuba Clan. [22]

Guardian SystemEdit

In response to Maya's tragedy, the Yotsuba enacted a policy of attaching guards to Clan Members who possess an especially superior disposition for magic, which is when the Guardians were created. [2]

The Guardians of the Yotsuba Clan bear the duty of preserving their primary's life even at the cost of their own. This title comes from the combat slaves that once rescued a young woman from the Yotsuba Clan from enemy attack and were responsible for preserving the Yotsuba bloodline. On the surface, this duty differs little from ordinary bodyguards, but temporarily hired bodyguards are fundamentally different from Guardians. While Yotsuba Guardians aren't selected from birth, once selected, their term is for life. Though they were the same as bodyguards in that they serve for 24 hours a day, 7 days a week, Guardians don't possess the right to resign from their duties. Since Guardians are only relieved when their primary is released from protection, to this day, without exception, Yotsuba Guardians are done with their duty only until the day they die. [23]

Guardians receive no monetary rewards. All the living necessities are provided by the Yotsuba. Whenever cash is needed, the Yotsuba supply it. To be correct that is not a reward, it is the cost of maintaining the power of protection. Guardians have no private life of their own. All of them, the male Guardians and the female Guardians, whether they call the one they protect Master or Mistress are devoted to serving that person. Guardians do not normally use the designations of "Master" or "Mistress" when present within the Clan. [24]

GuardiansEdit

Shiba Tatsuya [Mistress: Shiba Miyuki]

Only Miyuki can release Tatsuya from his duties as a Guardian, though another Guardian, likely of the same age and gender, would be dispatched to her. Of course, Miyuki hopes to retain Tatsuya as her Guardian for reasons that go beyond her own stubbornness. Within the Yotsuba Clan, a Guardian's duty is of the highest priority. While serving as Miyuki's Guardian, he wouldn't be assigned any meaningless tasks. Nor would he receive any dirty jobs. [23]

The Yotsuba Clan hasn't relinquished their hold on Tatsuya. He remains a Yotsuba Guardian. Only under the conditions of his role as a Guardian not being compromised, is he allowed to participate in military missions. Besides guardian responsibilities, the Yotsuba Clan is not allowed to assert their precedence. That is the agreement the JSDF 101 Independent Magic-Equipped Battalion has with the Yotsuba Clan. [7]

Sakura Series )Edit

The Second Generation of the modified “Sakura” Series are born of parents that were genetically engineered to grant them powerful magical abilities. The “Sakura” Series’ specialty is creating heat resistant barriers that repel physical objects. Though its functionality and variability are not on par with the Juumonji Family’s “Phalanx”, judged solely on its utility as a defensive mechanism. [25]

The Modified Body ‘Bard Series’ is a group of Magicians who are especially good at Systematic-type Oscillation (Vibration) Magic, especially in interfering with sound waves, and they are Magicians made for combat. However, the tendency of their specialized magic for fighting is different, specifically when it comes to search operations, detecting interference, bewitching and damage mitigation type magic’s rather than combat magic. [13]

ServantsEdit

ButlersEdit

There are eight butlers that serve the Yotsuba Clan under specific designations, however, Hayama is in-charge of the lower seven.

H

There is known to be at least one lesser butler that works at the Yotsuba Main House. [26]

MaidsEdit

There are several maids, though Shirakawa is in-charge of all of them.

Mrs. Shirakawa - (Head Maid)

Business VenturesEdit

In Japan there are companies that use "Yotsuba" or "Yatsuha" in their name. The Yatsuha name is associated with the Four Great Systems and Eight Major Types in Modern Magic as well as the Garbhako'sa-Dhatu Mandala, so modern corporations enjoy using the name. Using the name of the Yotsuba Clan from the Ten Master Clans is considered a taboo by individuals affiliated with magic. If Japanese corporations use the Yotsuba name, both intelligence and criminal organizations fear to rouse the Yotsuba Clan's wrath by harming their assets. There are companies that pretend to be affiliated to the Yotsuba Clan, even if they don't say otherwise. [27]

Four Leaves TechnologyEdit

Main Article: Four Leaves Technology

FLT, the literal translation is "Four Leaves Technology", although the official company records and brand name intentionally uses only "Four Leaves". It is secretly funded by the Yotsuba Clan and they hold the power of attorney over the stocks that Tatsurou received when Miya died. [28]

No relationship between FLT and the Yotsuba Clan was discovered when the Great Asian Alliance Special Ops Team was investigating the company. [27]

Hotel BusinessEdit

The Yotsuba Clan has hotels in every region throughout Japan that are either under their direct patronage or receive funding from them. The Kuroba Family in particular when due to the nature of their work, they end up going on numerous business trips and use these hotels. [29][30]

Secret Techniques/Unique MagicEdit

➨ Flash Cast

The Yotsuba secret technique to cast at fast speeds without the use of a CAD. It is made possible by mentally "carving" the images of the Activation Sequence into memory, allowing the user to recall the Activation Sequence directly from memory instead of a CAD to construct the Magic Sequence of the spell in the Magic Calculation Area of the brain. It can only be used with single systematic spells that are not overly long or complex.

➨ Psion Transfer

The ability to transform information into Psion signals and transfer that information through the nervous system and into another person's subconscious Magic Calculation Area through physical contact is unique to the Yotsuba Clan. Ordinary Magicians need to plug in the target data into their Magic Calculation Area when they invoke magic, however, the data is a Magician's perception in digitized form and generally can't be shared.

Linda has a little more cautious personality than her sister Emma Wahrheit. [1]

Both Linda and Emma have no "sisterly love" for one another. [1]

BackgroundEdit

The Wahrheit Sisters were born from the same fertilized egg and the same sperm of the same man and women. Both Linda and Emma were born from the same type of artificial womb, a month apart from one another. [1]

Linda shows a significant aptitude for the use of Convergent Systematic Reinforcement Magic as a member of the Burg Folge (Dritte Art) as someone with an augmented body. [1]Ernst Rozen sent Linda and Emma after Saijou Leonhart to capture him, but were beaten in combat by Leo, himself and

The Kuzumi family was formed from the test subjects of the Ninth Institute, originally founded to research how to "Streamline and Appropriate Ancient Magic into Modern Magic". [1]

The Old Ninth Research Institute was officially closed after WWIII. The new Institute is a joint civilian facility operated by the Kudou, Kuki, and Kuzumi Families that researches Perception-Type Magic

17
He and his children tend to be overly formal and dress accordingly. At work he wears a formal hat that is mentioned to look like he has read one too many novels, so he has a penchant for drama.

He enjoys bragging about his children. He is described as a “Yotsuba” to the marrow of his bones in the fact he feels that having his own children showing empathy for a tool (a Guardian like Tatsuya) is improper.

He is overly formal with his cousin Yotsuba Maya (and scared of her). He is very good at acting and hiding his true feelings behind a smiling mask, making him difficult to read.

BackgroundEdit

He lost his wife a long time ago, earlier than when the Shiba siblings entered middle school.

He is part of the Yotsuba and is the Head of the Kuroba Branch Family which is in charge of gathering intelligence.

Although the Yotsuba do not have any semblance of a direct lineage, Mitsugu is as close to a direct lineage as one can get in the Yotsuba clan. He is a Magician who manifested the Mental Interference aspect of the Yotsuba heritage.

AbilitiesEdit

“	Bearing the tasteless name “Poisoned Bees” that he applied himself, it was a sensory interference spell that increased the target’s pain perception infinitely until death. In this regard, if the target was someone who had a high pain threshold and was able to employ Counter Magic before the shock led to death then the spell would unravel, and there wasn't any effect on opponents who could cut off their pain sensors. In terms of killing power, this paled in comparison to the “Reaper’s Blade” created by his uncle, Yotsuba Genzou, the head of the Yotsuba Family two generations ago.

Still, it was premature to say that “Poisoned Bees” was magically inferior to “Reaper’s Blade”. The greatest advantage to “Poisoned Bees” was its ability to finish an opponent with the tiny prick of a pin. On the other hand, “Reaper’s Blade” required personal delivery to ensure death, leaving behind wounds on a corpse and blood splatter everywhere. In comparison, “Poisoned Bees” would only leave behind a nondescript wound that would be hard to link as the cause of death. When faced with a victim of “Poisoned Bees”, the initial assumption would be poison, then maybe death by suffocation, but the corpse would leave behind no evidence to support either hypothesis. For assassination purposes, “Poisoned Bees” was superb magic.

Another asset to “Poisoned Bees” was that this magic wasn't restricted to Mitsugu alone. Unlike most sensory interference magic, “Poisoned Bees” had an Activation Sequence that wasn't caster specific with a well streamlined process. In short, even Magicians other than Mitsugu were capable of using this magic. Naturally, this would require a degree of acclimation, but now all of the Kuroba agents employed “Poisoned Bees” as their trump card.

He together with Yotsuba Genzou and other Yotsuba Family members went to Dahan in 2062 with the intention of avenging Yotsuba Maya and destroy the Kunlunfang Institute. [2]

He was one of the survivors of the Yotsuba suicide squad responsible for the slaughter in Dahan that earned the Yotsuba Family the title of Untouchables.

As one of the candidates to being the Yotsuba heir, Fumiya is both skillful and powerful. In the Nine Schools Competition of 2096, in the Monolith Code event, he single-handedly took down First High School's team in the rookie division, a team that was undefeated prior to its match against Fourth High School's team and a team that included Shippou Takuma who was able to fight both Saegusa Kasumi and Saegusa Izumi at the same time to a standstill.

Outer-Systematic MagicEdit

Like Miyuki, as one of the members of the Yotsuba Family, he was born with an innate ability which has the trait of unique Outer-Systematic Magic.

Direct Pain

This is Fumiya's innate ability and as with all innate ability, it can be used at a high speed even without a CAD. With this ability, Fumiya can directly "imprint" pain into another person's mind. Fumiya appears to be able to control the level of pain his opponent experiences and can slip this ability in with another magic to fool his opponent about the source of his or her pain.

Non-Systematic MagicEdit

Phantom Blow

A flashy but intangible attack that can incapacitate the opponent by causing concussive-like symptoms using a single Psion shock wave.

Magic AbilitiesEdit

As a member of the Yotsuba Family and the twin sister of one of the candidates to become the next head, she is incredibly skilled in the use of magic. Her strength lies not in the activation speed, or power of her Zone Interference, but in the scale and range of her spell. It is because of this power that she is able to use her signature spells and consider herself (and to be considered) a rival to Miyuki.

Systematic MagicEdit

Like Miyuki and most powerful modern Magicians, Ayako is presumably talented in all forms of Systematic Magic. Ayako specializes in Convergence-Type and Dispersion-Type Magic.

Perfect Diffusion (aka Perfect Darkness)

“	Ayako had a forte -- the unique magic [Perfect Diffusion], aka [PD (Perfect Darkness)]. A magic that leveled out the target area's gaseous, fluid, and physical energy distributions to the point of non-detection. Categorically [PD] belonged to convergence-type magic. Since it could be recorded into an activation sequence it means it was a normal magic. However, it was safe to say that ordinary magicians could only use [PD]'s weaker version [Diffusion] with difficulty. Tatsuya knew only Ayako could cast [PD].

For example, if sound is to be [leveled off], both voice and music will be totally leveled off into white noise where it's impossible to decode their meanings. However, the sound, in other words the generated sound itself, could not be hidden. This is still on the level of [Diffusion].

When a sound-deadening leveling-off zone has been spread out, the [Diffusion] magic finally becomes [PD]. Ayako's magic activation speed and interference strength were inferior compared to Miyuki's. However, she could spread out event interference zones larger than Miyuki's, and for this it was praised as the Yotsuba's greatest ability.

It's on dimly-lit outdoors at night where Ayako can fully unleash her specialty. She can selectively and instantaneously level off her own or her allies' reflection and emitted electromagnetic waves, melding into the darkness. By leveling off audio waves and air current variations, she can evade auditory and olfactory detection. And so she assimilated them into the night. Her code-name [Yoru] was based on one character of her first name, and at the same time it designated her unique perfect diffusion magic.

”

—Volume 13, Chapter 5

Mock Teleportation

A simple, yet multi-system spell that utilizes Weight-Type, two layers of Convergence-Type, and Move-Type Magic. This spell removes an object’s inertia (including the human body), surrounds it with a cocoon of air, and creates an even larger tunnel of vacuum around it to move the object through that tunnel. Despite the multi-system nature of this technique, it only uses four basic processes and isn't too much of a complicated spell. There are some disadvantages, however, as the users needs to scout out the destination prior to forming the surrounding air currents that buffered the tunnel of vacuum. If someone had the ability to repeatedly leap into the air while using this ability, they might even be able to continuously use this ability to confuse their opponent. However, this technique was fundamentally incompatible with attacking and was more suited for fleeing.

Ultimate Scattering

“	Ayako’s specialized magic was ‘Ultimate Scattering’, a convergence type magic that diffused vapor, energy, etc. evenly to the point where they could barely be recognized anymore, The Ultimate Scatter spell had no direct relationship with Mirage Bat. However, Ayako had another magic which was just as much a specialty of hers as ‘Ultimate Scattering’. ”

—Volume 13, Chapter 6

EquipmentEdit

Head Mount DisplayEdit

Kuroba Ayako LN12

This is an "eye patch"-like item that is actually an HMD (Head Mount Display) and that Ayako wears on some of her missions. The exact functions of this head mount display are unknown, but the HMD appears important enough for Ayako to wear it even though it causes her some discomfort.

They are the branch family responsible for the supervision and gathering of intelligence for the Yotsuba. [1]

Kuroba Fumiya, the eldest son of the Kuroba had been the number two candidate in-line for succession of the Yotsuba Clan. [2] That is however before he relinquished that position in favor of his cousin Shiba Miyuki, for which his entire family was in agreement. [3]

Kuroba Mitsugu's wife, Shinonome Aya, is stated to have died young. This perhaps attributing to why he dotes on his children. [4]

All of the agents the Kuroba employ, use 'Poisoned Bees' as their trump card; a Sensory Systematic Type Magic that increases a target’s pain perception infinitely until death. The greatest advantage to “Poisoned Bees” is its ability to finish an opponent with the tiny prick of a pin, leaving behind a nondescript wound that would be hard to link as the cause of death. [5]

They are from the Ninth Institute, where the research focus was, the "Streamlining and Appropriation of Ancient Magic into Modern Magic". [1]

The Old Ninth Research Institute, which was officially closed after WWIII, and is currently a joint civilian research facility operated by the Kudou, Kuki, and Kuzumi Families that researches Perception-Type Magic. [2]

Even while he was over sixty years old, Mamoru retired handing position of Family Head over to his eldest daughter in order for him to work alongside Kudou Retsu as his "hands"