This is all taking place in a Japanese anime animated universe, and it's just the norm for everything and everyone to look like that. The majority of Shinigami resemble regular humans. Sousuke Aizen is the captain of the 5th Division of the Gotei 13, whose lieutenant is Momo Hinamori. For over a century, Aizen has been masquerading as a benevolent Shinigami officer while secretly plotting his betrayal and conducting depraved experiments, which around 100 years ago led to the Hollowfication of the Visored and their (alongside Kisuke Urahara's) forced exile. Soon, he plans to slaughter the members of Central 46, orchestrate Rukia Kuchiki's execution, and fake his own death in a successful ploy to obtain Urahara's Hōgyoku. After retrieving said artifact, Aizen and his longtime followers, Gin Ichimaru and Kaname Tōsen, plan to retreat from Soul Society into Hueco Mundo, where Aizen has built an army of Arrancar. Aizen actually doesn't even need his glasses. He's actually just been wearing them for over a century in order to look more disarming. Aizen's ultimate goal is to reach and overthrow the Soul King. Since he is a Shinigami, Aizen has lived for well over 200 years. Aizen is a 6'1" tall, lean Shinigami of fair complexion that resembles an attractive human man in his 30's (despite being much older in human years), whose hair and eyes are a similar tone of brown. His hair is in a soft, shaggy curtain style and he wears black, square-framed glasses, which along with his eyes (slightly droopy at the outer corners) give him a disarming if not scholarly look, as well as the most innocent and gentle face ever. For attire, Aizen is currently wearing a standard Shinigami shihakushō with a long-sleeved captain's haori, its inside being a pale turquoise to signify the 5th Division. When in public, Aizen practically always wears a gentle smile on his face. Even when fighting. Aizen has a deep voice and is a bit soft-spoken, constantly maintaining an even tone. Currently, Aizen presents himself as a kind, caring, friendly, and polite captain of the Gotei 13. He shows concern for others' well-being, and is quite generous, such as when he let Momo spend the night in his office when she has trouble sleeping. His charisma in particular has earned him Momo's admiration, who expresses gratitude for being able to be his lieutenant. Additionally, Aizen appears to be respectful toward his fellow captains and lieutenants. Though he generally maintains a calm and composed demeanor, occasional moments of darkness surface, such as when he coldly warned Gin Ichimaru not to underestimate him. However, Aizen's benevolent persona is nothing more than a facade, masking his true nature as a power-hungry and sadistic manipulator, even before revealing his deception to the Gotei 13. His entire outward personality is an illusion, much like the ability of his Zanpakutō, Kyōka Suietsu. His ultimate goal is to kill the Soul King and bring about the end of the Soul Society, believing that the Three Worlds would be better off without "that thing." To achieve this, Aizen seeks to harness the power of the Hōgyoku, a reality-warping object he believes can grant him divine powers elevating him above both Shinigami and Hollows. In reality, Aizen is also highly condescending towards others; and whenever confronted he is casual and uncaring, attempting to draw out conversations and make small talk, which often infuriates those he is talking to. Aizen's pursuit of power is marked by ruthless pragmatism, as he sacrificed countless Shinigami and Rukongai citizens to the Hōgyoku in an attempt to awaken it. His willingness to experiment on others is evident in his creation of White, a Hollow developed using the Souls of Shinigami, his orchestration of the Hollowfication process that transformed the Visored, He even goes as far as eliminating the Central 46 and masquerading as them to ensure Rukia's execution by the Sōkyoku so he can retrieve the Hōgyoku hidden within her, showing that he does not care what happens to others as long as he gets what he wants. Despite his sadistic tendencies, Aizen does not kill indiscriminately, claims that he is not without compassion, and is also capable of sympathy. Aizen's Reiatsu is able to erase any Human from existence. Aizen's defining trait is his immense arrogance, which manifests as a god complex. He frequently dismisses even powerful opponents as being weak and claims his intellect is second only to Kisuke Urahara; as such, he rarely shows any sign of alarm or distress. His overconfidence blinds him to failure, as he took Gin Ichimaru under his wing despite knowing of his looming betrayal. Despite his arrogance, Aizen is still capable of showing respect towards others for their capabilities. He is also rather humble when it comes to earning praise himself. He is also highly cautious, and often has entire situations planned out well in advance. Aizen is highly manipulative, exploiting the trust and emotions of those around him. Notable cases of his manipulative character include cultivating Momo's admiration, knowing she will be easy to control, and strategically placing Renji in the Fifth Division while positioning Rukia and Izuru under himself and Gin for future use. His deception extends even to his allies and he believes truth and lies do not exist, only harsh reality, and that weak people cling to convenient untruths to avoid painful facts. Aizen exhibits a deep prejudice against both Humans and Quincy. During his time as a captain, Aizen likes tofu, but dislikes boiled eggs. In his free time, he often read, and he gives a special lecture of calligraphy at the Shin'ō Academy because he excelled in this branch of arts. This optional course is immensely popular among the Shinigami students. Aizen also seems to like winter. Other than his raw strength, Aizen's most fearsome trait is his intellect, made apparent by his consummate skill in the Shinigami combat arts, his genius as a scientist and strategist, and his mastery of the human psyche. The latter is so great, Aizen can flawlessly manipulate all but the most astute people through sheer charisma, deceit, and mind games. Aizen's ability to predict what someone will do down to the last detail after analyzing their minds, motives, and histories is likewise second to none. Perhaps most notable about Aizen's intellect is his brilliance as a schemer and tactician. Aizen has kept virtually everyone in the Seireitei (from the Gotei 13 to the authorities of Central 46) in the dark about his machinations, manipulating them for his own ends while never once letting his facade as a kindly and innocent Shinigami officer slip. For over a century Aizen has remained dormant in Soul Society, masquerading as a kind and well-meaning Gotei 13 officer; by successfully framing Urahara for the Visored's Hollowfication 101 years ago (tricking the judiciary of Central 46 by planting false evidence and using his Zanpakutō ability to forge an alibi), he forced the handful of people aware of his crimes into exile, eliminating them as threats. Aizen's genius extends to battle: from his mastery of the Shinigami arts to his shrewd analyzing of enemies' strengths and weaknesses, to his habit of planning out scenarios well in advance. Despite his arrogance, Aizen is highly cautious going into battle, even placing protection spells on himself to cover his worst blind spots. On the off-chance that Aizen will come up against an opponent stronger than him, he prepares countermeasures to avoid facing them directly. An erudite man who has performed much research into the world's history and esoteric secrets, Aizen is privy to information that is unknown to most in Soul Society. A scientist at heart, Aizen has proven himself to be a highly ingenious man. Aizen's greatest scientific breakthroughs other than (but facilitated by) the Hōgyoku are in the fields of Hollowfication and Shinigamification, which taught him much about the ontological relationship between Shinigami and Hollows. Since his days as a lieutenant 110 years ago, Aizen engaged in unprecedented Hollowfication experiments on the Souls of Rukongai citizens and Shinigami, while arousing no suspicion from authorities; one such experiment was the Visored's Hollowfication, which doubled as verification of the Hōgyoku's true nature. Even by captain-level Shinigami standards, Aizen's spiritual power (Reiatsu) is utterly enormous. Aizen's concentrated Reiatsu can vaporize Shinigami bodies. Aizen's power makes his mere presence feel monstrously overwhelming even to a Gotei 13 lieutenant. Aizen himself noted that it takes a lot for him not to "crush an ant" (referring to 6th Division Lieutenant Renji Abarai) in his path, and even without conscious exertion, the weight of his Reiatsu left 13th Division Lieutenant Rukia Kuchiki too weak to stand. With his Reiatsu alone, Aizen can cancel out the abilities of those weaker than him. also easily being able to cut down captain-level opponents. Aizen is a master of Zanjutsu, preferring to end engagements by delivering single blows of high speed and flawless precision. He can fell captain-level opponents with simple maneuvers, often as he blitzes past them faster than they can react to, and by putting extreme weight behind his blade can cut cleanly through very sturdy targets, like Renji's Shikai. Despite his clear penchant for swordsmanship, Aizen excels in hand-to-hand combat. His forte is intermixing Hakuda and Zanjutsu, often blocking and using enemies' own weapons against them with his free left hand while using his sword-wielding right hand to attack; Aizen has repeatedly blocked opponents' swords mid-attack with a finger or his bare hand, creating openings to land a counterblow. Aizen's mastery of the Shinigami arts extends to Hohō. He is so fast that most enemies cannot keep up, losing sight of him or failing to register Aizen striking them until after the damage manifests. Aizen is a master of Kidō, well-versed in Hadō and Bakudō alike. He can cast high-ranking spells without a chant, can use mid-level Hadō spells to great effect by speaking only the name, without type and number, and can silently conjure small yet sturdy energy shields to block attacks at close range (even keeping one such shield, invisible while inert, affixed to his nape in order to make up for the blind spot). Aizen's unassuming size belies his physical strength, which far exceeds the average captain's. He also has immense durability. Kyōka Suigetsu (Mirror Flower, Water Moon): Aizen's Zanpakutō appears as an ordinary katana with a metallic-gold tsuba that is of hexagonal shape, a tsuka with green wrapping (leaving traditional rhombus gaps) and a golden kashira, as well as a green (black in the anime) saya. Kyōka Suigetsu does not outwardly change between its sealed and Shikai forms. The release command, "Shatter" (Or kudakero), is spoken to both activate and deactivate the Shikai. The sword's sealed and Shikai states being identical, plus Aizen's ability to release silently, helps the release go unnoticed. Aizen's Shikai ability is to control the five senses, allowing Aizen to make his enemies misperceive everything about someone or something: form, shape, mass, feel, smell, etc. The hypnotic ritual — that is, the sole condition to place a target under Kanzen Saimin — is Aizen showing them his Shikai release. If they see it once, the target will be under the hypnotic spell ever after, succumbing to it with every new release no matter how long ago they were hypnotized. Aizen frequently conjures illusory copies of himself to act as decoys (or substitutes himself with another person) while hiding his own movements, allowing him to attack with impunity while his foes remain helplessly distracted. Though usually simple, Aizen's illusions can be made very intricate. Aizen has told the other Shinigami that the ability of Kyōka Suigetsu is to use diffused reflection of running water and mist to confuse enemies into attacking eachother. A lie that they have all fallen for. The Soul Society is one of the spiritual afterworlds where deceased humans go to posthumously. This is also where the Shinigami live and operate from, and where most souls dwell until they are reincarnated into the Human World. Alongside the World of the Living and Hueco Mundo, Soul Society counts as one of the Three Worlds. While referred to as simply Soul Society by its residents, this area is actually the East Branch of a larger Soul Society, with an area in Reverse London marked as the West Branch. While Soul Society is usually described as something of a paradise, where nine out of ten times it is better than the living world and hunger is never a problem, Soul Society is far from sublime. In fact, aside from the slowed aging and lack of hunger, life there is much like that in the living world. Soul Society consists of the Rukongai, where souls live when they arrive in Soul Society, and Seireitei, which is at the center of Soul Society. The mode of life here closely resembles that of feudal Japan. The Human World and Soul Society are parallel to each other and are two sides of the same coin; while the exact starting point of humanity in the Human World is unknown, Soul Society itself is over a million years old. Families separated by death are rarely reunited in the Soul Society unless they arrive in Soul Society together. People live nestled together like a family of strangers. One never gets hungry (if she or he doesn't have spiritual powers) and aging is slowed to a great extent, with lifespans of 2000 or more years not being unheard of, though such ages are limited to Shinigami or other souls with high spiritual power. Children can be born as they are in the Human World. People can also be killed as regular humans are, though they are capable of surviving wounds that would normally be considered fatal. A soul that dies in Soul Society is eventually reincarnated on Earth after having spent a certain amount of time there. Shinigami enter and leave Soul Society by unlocking the Senkaimon and using a Jigokuchō. Pluses, on the other hand, enter Soul Society through the ritual of Konsō. When people die, they are assigned a number to a part of Soul Society according to when they died. Spirits can be born in Soul Society as much as in the living world, with the Shinigami acting to balance the number of souls in each world. Intruders can pass through the Senkaimon in the same manner, but only in soul form. This allows spiritual beings to enter without permission. Humans can also use such a gate through the use of Reishihenkanki which converts solid matter into Reishi. Finally, Hollows can also directly rip a hole to Soul Society from Hueco Mundo, or in the case of Arrancar, using Garganta. Soul Society is maintained by the Soul King, a deified entity whose existence is pivotal to the balance of the Three Worlds as it regulates the flow of souls into and out of Soul Society, leaving administration of the afterlife to the Central 46 and the Noble Houses. The Soul King lives at the Royal Palace in a dimension separated from Soul Society itself and protected by the Royal Guard. The Soul King has a specific system of "specialty duties" which are actively carried out, although the exact nature of these duties is unknown. The dimension can only be accessed with an Ōken (King's Key). The supposed location of this Ōken is passed down verbally from one Gotei 13 Captain-Commander to the next, the former holder being Genryūsai Shigekuni Yamamoto. According to Rangiku Matsumoto, most Shinigami have never seen the Soul King. Another part of the government are the Noble Houses, especially the Four Noble Families, which are considered to be the highest of them all. The lower noble houses all serve one of the four each. The Central 46 serve the Shinigami royalty. They are made up of 40 wise men and 6 judges, selected from all of Soul Society. They are sealed into an enclave in Seireitei called Seijōtōkyorin which no one else may enter, regardless of their military or civilian status. They act as a supreme judiciary organization whose authority puts it in direct control of the legal system. They handle all rulings on Shinigami and souls who have violated prohibitions. Their orders are absolute and no decision has been known to be overturned. Certain crimes allows for the punishment of exile, commonly stripping a Shinigami of their powers and banishing them to the Human World. A punishment not well known among the citizens of Soul Society is the detention of Shinigami. It is commonly reserved for those who have either broken the law, quit the Gotei 13, or those who just seem dangerous and mentally unstable (as per the government's interpretation). This is carried out by the Onmitsukidō. The Central 46 can sentence a Shinigami to be held in the Central Great Underground Prison for a set amount of time. The prison has eight levels which prisoners are confined in based on the severity of their crimes. Sōkyoku is a form of execution usually reserved for those with extremely strong spiritual powers, namely Shinigami captains. The Sōkyoku is a giant halberd that utterly destroys a soul on contact. When released, Sōkyoku takes on the form of a phoenix, its true form, called Kikōō. The Kikōō has the destructive power of a million Zanpakutō, and that power is multiplied by a factor of 10 at the moment it pierces its victim. The Gotei 13 (Or 13 Court Guard Squads) is the organization which most Shinigami join after graduating from the Shin'ō Academy. It is split into thirteen divisions (hence the name), with several divisions having certain specializations. The 4th Division is the medical division, the 11th Division is the combat division, and the 12th Division is the research/science division. The 9th Division is in charge of newspaper and magazine-related duties. It's unclear the other divisions are not specialized. The Gotei 13 has some superiority and little authority over the two other branches. The Captain-Commander of Squad 1 is Genryūsai Shigekuni Yamamoto, The commander of Squad 2 is Suì-Fēng, The commander of Squad 3 is Gin Ichimaru (A white-haired, sarcastic, mysterious, mocking, ever-smiling and suspicous male Shinigami. Gin's Shikai is triggered by the phrase "Shoot to kill" and in its Shikai, Shinsō's blade glows white and extends at high speed to impale Gin's opponents from a distance), The captain of Squad 4 is Retsu Unohana (A kind and serious female Shinigami that is a fantastic healer), The captain of Squad 5 is Sōsuke Aizen, The captain of Squad 6 is Byakuya Kuchiki (The very serious male heir to the noble Kuchiki family who values law and order over all else), The captain of Squad 7 is Sajin Komamura (Loyal, humble and compassionate male Shinigami), The captain of Squad 8 is Shunsui Kyōraku (Male, black-haired flamboyant, laid-back, and peace-loving Shinigami who masks a deeply analytical and burdened mind), The captain of Squad 9 is Kaname Tōsen (Blind back-haired black Shinigami that prefers to 'walk the path lease soaked with blood'), The captain of Squad 10 is Tōshirō Hitsugaya (A young prodigy Shinigami that looks to be 13 years old but is much older in human years though still a boy by Shinigami standards, and is white-haired, serious, and excels at Ice-based Kidō), The captain of Squad 11 is Kenpachi Zaraki (A big muscular male Shinigami that loves to fight and doesn't care about learning about how to improve or communicate with his Zanpakutō), The captain of Squad 1 is Mayuri Kurotsuchi (A creepy male Shinigami who is painted head to toe with black and white paint, painted yellow teeth, and bright blue hair and is totally a mad scientist that tests on everyone that he is able to even his own squad members), And the captain of Squad 13 is Jūshirō Ukitake (A male white-haired genuinely kind and honorable Shinigami). Also known as the Zero Division, the Royal Guard is made up of former captains of the Gotei 13 who are responsible for protecting the Soul King. Each member of this group has been acknowledged by the Soul King for having made significant contributions to the Soul Society's development and was promoted to the Royal Guard for their respective achievements. As serving and protecting the Soul King is their primary purpose, the Royal Guard does not interfere in the Gotei 13's affairs or play an active role in defending Soul Society against outside threats. They also only take orders from the Soul King and the Royal Family; the Central 46 has no control over them whatsoever. The Kidō Corps are all members that excel in Kidō. There is little information about the operations of the Onmitsukidō. They are currently lead by Suì-Fēng, who is also the captain of the Gotei 13's Second Division. One of the more unusual aspects of Soul Society is its technology level. While the lifestyle and culture of Soul Society is comparable to feudal Japan, they possess technology of a level exceeding that time period. The Shinigami Research Institute has developed amazing technology to their credit by mixing spiritual technology with organic components, allowing for the creation of creatures that do everything from detecting spiritual energy signatures to allowing Humans to see a spirit without the use of a Gigai. They possess touch-screens and databases that are mainly used for storing files and historical documentation in the Daireishokairō (Great Spirit Book Gallery), which contains all the knowledge and history of Soul Society. There is also view screen technology that is capable of sending signals to the Human World and Dangai, which allows for face-to-face communication between worlds. Blending old traditions and ideas with new innovation, Soul Society is an enigma in this comparison. Residents and Soul Reapers (Shinigami) in the Soul Society generally write using traditional Japanese calligraphy (ink and brush) for official documents and formal records, and use modern touch-screen databases or "soul cellphones" (like the Denreishinki) for official Seireitei communication. Rukongai is the largest portion of Soul Society and the most populated. It is divided into 320 districts (80 in North Rukongai, 80 in West Rukongai, 80 in South Rukongai, 80 in East Rukongai). Seireitei (Court of Pure Souls) is in the center of Soul Society, a circular shiro with four main entrances, each guarded by a Gatekeeper. The walls of Seireitei are made of stone called Sekkiseki (Spirit Reducing Stone), a material known to negate all Reiryoku, similar to magnetic lodestones. The stone also forms a spherical barrier around the city which stops anything spiritual from breaching it. It is forbidden for a Shinigami to intervene in anything that is related to Hell. The Zanpakutō is the main weapon of the Shinigami, used for various purposes such as defeating Hollows, sending spirits to the afterlife, or traveling through the Three Worlds. Apart from Shinigami, Hollows that have removed their masks and gained Shinigami powers, known as Arrancars, also wield Zanpakutō, though an Arrancar's Zanpakutō is fundamentally different from a Shinigami's. The art of wielding a Zanpakutō is called Zanjutsu, one of the four Shinigami combat styles in the Zankensoki. An Asauchi is a nameless Zanpakutō given to Shinigami unworthy of being in the Gotei 13. "Shallow hit" refers to the grossly reduced power of a Zanpakutō whose wielder cannot connect with it properly. Zanpakutō are the trademark weapons of the Shinigami. Capable of cutting spiritual bodies, they are among the few weapons which can be used to combat Hollows. A Zanpakutō is different from a Quincy's Spirit Weapon; while a Shinigami channels Reiryoku from their soul into their blade, a Quincy does the opposite by gathering Reishi from the atmosphere to form a weapon and coat it with their Reiryoku. Each Shinigami carries a Zanpakutō, and each Zanpakutō is unique: far from mere weapons, the swords are reflections of a Shinigami's power and soul, and sentient beings unto themselves. Indeed, the very nature of the Zanpakutō is complex: they cannot simply be classified as weapons, powers, extensions of their wielders, or separate beings; they are all of those at the same time. The Zanpakutō's name is the name of the living spirit which empowers the sword and lends its strength to the Shinigami who wields it. These beings can vary greatly in appearance, and have their own distinct personalities, which are nonetheless similar to their owner's. A Zanpakutō's shape and abilities are based on their Shinigami's soul. Once a Shinigami learns their Zanpakutō's name, they can communicate with one another and grow stronger together. Zanpakutō are born with their Shinigami, and they die along with their Shinigami. Shinigami use them in battle as a reflection of their heart. When released, they can display a vibrant power. They are one with the Shinigami, and they share a Shinigami's conviction. However, if a Shinigami experiences mental instability, they can lose harmony with their Zanpakutō, making it impossible to hear the spirit's voice and rendering them unable to access their Shikai, even if they know its name. Abusing a Zanpakutō Spirit can further deteriorate this bond and may even permanently sever the connection between Shinigami and Zanpakutō. Every Zanpakutō has its own name, which the wielder must learn. Such weapons are unique swords generated from their owner's souls. Its shape, even in its sealed state, differs depending on its owner. Because they are part of their owner's soul, a Zanpakutō cannot be replaced, though it will slowly regenerate if it is broken. No Zanpakutō has a Shikai and a Bankai with completely unrelated abilities. A Zanpakutō can determine if its wielder is worthy of its power. If the wielder is deemed unworthy, the Zanpakutō may refuse to reveal its true Bankai name, thereby limiting its full potential. Conversely, a wielder can release a weaker form of their Shikai by using an incorrect release command. Additionally, a Zanpakutō Spirit or an external entity connected to it can suppress the wielder's power, leading to a significantly weaker Shikai and Bankai with altered forms, even if the wielder knows their true names. A Zanpakutō possesses a true form that resides within its Shinigami. As sentient beings, Zanpakutō have their own minds and bodies, which dictate their powers. A Shinigami can grow stronger through communication with their Zanpakutō. In rare cases, a Zanpakutō Spirit can even create another Zanpakutō Spirit with a unique name and appearance. Inside each Zanpakutō is an incarnation which manifests itself upon the Zanpakutō's transformation. The first step is to acquaint oneself with this incarnation. Zanpakutō that have merged with a power source that is not of Shinigami nature or origin can also gain the ability to protect their Shinigami wielders through various means. Certain unique Zanpakutō can also be passed onto other Shinigami, who can then access their inherited abilities. The size of a Zanpakutō reflects the amount of the wielder's spiritual power. However, this does not necessarily mean that someone with a larger Zanpakutō is stronger than an opponent with a smaller one. Regardless of a Zanpakutō's form or size, it is always effortless for its wielder to use because it is part of their soul. Some Bankai may be exceptions. Zanpakutō possess their own Reiatsu, which can be sensed like any other Reiatsu and is similar to their wielder's, albeit with subtle differences. If a Shinigami pierces a human's chest with their Zanpakutō and channels their Reiryoku into them, it can temporarily transform the human into a Substitute Shinigami. However, this method has a low viability rate, even for spiritually aware Humans, and failure results in death. Momo Hinamori is the lieutenant of the 5th Division, under Captain Sousuke Aizen. Momo's main pastimes are reading and drawing. Momo is generally an upbeat, easy-going, and friendly girl. She has a strong friendship with Tōshirō Hitsugaya, whom she grew up with, repeatedly calling him "Shirō-chan". Though normally kind, her rare bouts of anger can appear rather menacing. Jigokuchō (Hell Butterfly) are black butterflies used by Shinigami to serve a variety of purposes. The bodies of Jigokuchō are completely black, while the wings are purple with a black outline. They guide the Shinigami through the Senkaimon when traveling between Soul Society and the Human World, thereby saving them from the inconvenience of passing through the Dangai. Jigokuchō are also used as messengers among Shinigami, often carrying important orders. Hell Butterflies are taken care of by Shinigami in Seireitei, this task usually being carried out by new and inexperienced members of the Gotei 13. Jigokuchō, like the Shinigami themselves, are only visible to spiritually aware beings. Hollows are a race of masked spiritual creatures which are born from human souls who, for various reasons, do not cross over to Soul Society after their deaths and stay in the Human World for too long. They are corrupt spirits with supernatural powers which devour the souls of both living and deceased humans. Hollows settle in Hueco Mundo, but can cross over to the Human World and Soul Society. A Hollow that has removed its mask is referred to as an Arrancar. They vary in size and appearance and can range from being humanoid to monstrous. The types of Hollows are: Standard Hollows (Which are the baseline malevolent spirit born from human souls unable to pass on), Demi-Hollows (Which are also known as Jibakurei, and are earthbound spirits currently in the process of transforming into full Hollows), Menos Grande (Massive, powerful Hollows which are created when hundreds of basic Hollows gather and merge into a single entity in the realm of Hueco Mundo), Gillian (The lowest class of Menos which are giant, towering foot soldiers with identical appearances and limited, hive-mind intelligence), Adjuchas (A stronger, smaller, and more animalistic Menos. They are created when a Gillian gains an dominant personality and consumes other Hollows. They must continuously consume Hollows to maintain their form, otherwise they will regress back to Gillians), Vasto Lorde (The highest and rarest tier of Menos. They are humanoid, possess intellect that rivals or exceeds Soul Reapers, and have destructive power greater than Captain-class Shinigami), Arrancar (Hollows who have achieved Soul Reaper powers by removing part or all of their masks. They take on humanoid forms, possess immense intelligence, and wield Zanpakuto), and Vizard/Visored (Soul Reapers who have artificially acquired and mastered inner Hollow powers)