Death World/Beings

Humans
Humans are the most abundant individuals in the series. They can be considered the weakest of all the types of beings, having no recognizable, unique power. Despite this, their souls are highly sought after for those on their way to becoming a Kishin. Humans with exceptional soul wavelengths are considered meisters. A human's soul is distinguished by a blue color.

Despite most humans displaying no unique power, their soul's, however, seem to be extremely special. A human becomes an Evil Human once the person in question consumes another pure human soul. The end result is that the human's soul becomes corrupted and thus proceeds to feed on more human souls which leads them on the path of becoming a Kishin. It should be noted that consuming a pure soul causes the consumers soul to become corrupted but, paradoxically, however, consuming an Evil Human's soul has no recognizable side effects. Human souls can be considered a delicacy for the insane and has been alluded to yield far more gains than consuming an evil soul, though at the cost of one's sanity.

Shokunin
Shokunin or Meisters are people with exceptional soul wavelengths and are paired with buki.

Meisters are best known for being paired with a weapon, but top-level meisters can fight on their own. Stein, the strongest meister who ever graduated from Shibusen, did not dread the prospect of fighting against two meisters unarmed and while in a chair. This was also seen when he was teaching a class on team Resonance. During this occasion, he instructed Maka, Ox and Black Star to fight him and not hold back. Once again, he fought them all while sitting on his chair.

The skills of a meister vary from person to person but they all must know how to channel their soul's wavelength. This can either be through themselves or through a weapon. During both these instances, the meister can unleash a variety of abilities.

It also seems to be a prerequisite that a meister be physically fit. In fact, nearly all meisters revealed appear to be physically fit. The need to be fit is given credence when Nygus noted that it's a shame that Patty is a weapon after witnessing her take down numerous opponents without a loss in form.

Although not exactly an ability in the true sense of the word, it would seem to be common among meisters to have their "themes" present during the use of their abilities. An example of this is Sid, who has an undead theme. This theme of his is present in the name of his attacks, the changing of his weapon into a tomb when performing a resonance, and the fact that he is a zombie. Stein, a scientist who loves to dissect, has stitches present on the blade of Witch-Hunt Slash when he performs it with Spirit. Kid, too, has skulls present on his death cannon when he performs a soul resonance with his two pistols.

Levels
There are three different levels of a meister, with each designated with a star. One-star being the lowest and three-star being the best. The difference between the ranks is evident from the focus in battle, types of skills used, and mially to harvest evil human souls, rarely straying from these types. This likely stems from the fact that most new meisters strive to gather souls and create a Death Scythe. Two-stars and above seem to be sent on specific missions that can have nothing to do with harvesting souls. Often, possessing a skill that would prove advantageous to them. Sid, for example, is normally sent on missions as a spy. Three-star meisters are the best meisters being able to fight without a weapon and being common wilders for death scythes.

This classification is used to both meisters and weapons.

Buki
Buki, Weapons or Demon Weapons are human beings who have active 'weapon genes', which gives them the ability to transform completely or partially into the form of a specific (sometimes polymorph like Tsubaki) weapon.

The first buki were created 800 years ago prior to the start of the series by the witch Arachne, following instructions found within the Book of Eibon. To create a demon weapon she murdered a fellow witch to use as a sacrifice. Using the witch's soul, which has the power of transformation, Arachne mixed a inanimate weapon and a human soul to create a being which had the ability to transform from human to weapon form. This act of killing her own kind labeled her as The Heretic Witch and caused her to be hunted by both Death and witches alike.

The abilities of a buki are passed down through generations, however, depending on the circumstances of an individuals life the weapon genes may or may not be awakened. There are families like the Nakatsukasa clan which are made up entirely of buki, and families like the Evans family where the weapon Soul is apparently the only member to have inherited the genes for numerous generations. There are also very rare cases like Maka who inherited her father's genes, but became a meister instead of a weapon (This is only the case in the anime, and has not been mentioned in the manga).

When becoming a weapon, the buki's clothing and everything on their person is carried on into the transformation. After becoming a weapon, the person is seen in his/her human form as some sort of reflection on the weapon and is seen in a completely black space when viewed inside the weapon. Inside their weapon, buki seem to be able to have easy access to their souls, as Soul can enter the black room in his mind from his weapon form. Often, in this dark space they are seen without their clothing on, save for a few details (Harvar appears with his visor on). In other cases they can be seen with their entire clothing (like masamune). The buki also glow in the color of their souls when inside Weapon Form. For example, Soul Eater has a blue soul, as such, he glows blue when transforming, Tsubaki has a yellow soul, therefore she glows yellow, the Thompson sisters both have pink souls, so they glow pink.

Some buki in their weapon form have certain components that move similarly to facial expressions; such as Soul, whose Weapon Form has a red eye on top of the haft, which can convey his mood by narrowing when he is angry or ready to fight, or widening when he is startled. Ragnarok's weapon Form has a mouth on the blade near the guard.

Most demon weapons can also transform parts of their body into Weapon Form to enhance lethality in battle, however with the exception of a few autonomous weapons, most are stronger when being paired with a meister.

By performing resonance between a shokunin and a buki, the weapon can unleash a variety of abilities and can even change its physical form (kid's death cannon, for example).

There is apparently no restriction on who is capable of wielding buki, but when a specific weapon is wielded by someone who cannot effectively resonate with them, a rejection reaction occurs, this reaction is derived from a misalignment in the shokunin's soul wavelength, resulting from incompatible personalities, and appears to differ depending upon the individuals involved. For a weapon and meister to be compatible, they have to be able to accept and understand each others' personalities. Most compatible pairs seem to be opposites in personalities, especially seen with Black☆Star & Tsubaki and Ox & Harvar. People with similar personalities like Soul and Black☆Star cannot become an efficient team. So far, Soul & Ragnarok are the only ones to show a rejection reaction though.

Symptoms of this rejection seems to vary on how much the Wavelengths are incompatible. When Black☆Star tried to wield Soul, their wavelengths were so incompatible, that he could not even lift Soul from the ground, and when he sent his wavelength through him, it caused the physical harm on the buki. In the brief moment when Maka couldn't resonate with Soul, the rejection reaction was milder, but still harmful, as even though Maka was able to wield Soul, his weapon form was extremely hot to the touch and she severely burnt her hands until she could resonate with him again. Ragnarok's rejection reaction effects Crona as well as they both share the same body, and when their wavelengths became misaligned, dozens of Bloody Needles erupt uncontrollably from Crona's body and the pair lost their ability to utilize the black blood.

Evil Humans
Evil humans are the product of a normally pure humans consuming a pure innocent human soul or, to be specific, a soul that is not a part of the Death list. The end product is that the human's soul becomes corrupted and gains the urge to feed on more souls. Ultimately, this leads to them being hunted down by Meisters and killed before they become a Kishin. Evil humans are distinguished by their mostly abnormal appearances, their homocidal behaviour and their uniquely red souls with dark 'scales' on some parts of the surface once killed (last one anime only).

Normally, a human proceeds to consume another human's soul out of some sort of fear, a means of gaining power, or due to a personal reason that are unique to that person. The Star Clan, for example, is infamous for becoming obsessed with power and consuming innocent souls. Masamune, Tsubaki's older brother, devoured souls due to an inferiority complex developed after Tsubaki inherited the majority of their family's Weapon heritage. Once a pure human has devoured a pure soul, it is considered to be on the path of a Kishin. After consuming enough souls, the Evil human can become a Kishin.

Most Evil humans, when fully transformed, no longer resemble a perfect human form and take on strange distorted humanoid figures, like with Jack the Ripper, a long-limbed grey-skinned vaguely human-like creature with metal claws, and Rasputin who takes on the form of a giant human-like form. However, there have been exceptions, as Masamune looks perfectly human, despite being an Evil human, although during the fight with Tsubaki, his human form starts to display Evil human-like characteristics, especially in his facial features. Comparing Jack the Ripper with more human-like Evil humans such as Masamune and Alcapone, the appearances of Evil humans seem to vary. Strength and power and personality also seems to vary, and may very well depend on what sort of character the Evil human was before walking the path of the Kishin.

Once a human becomes an Evil human, their soul turns into what is called a Kishin's Egg. Since the aim of all Evil humans are the same (to kill and devour souls) their souls all take on the same appearance, that of a Kishin Egg. A Kishin Egg is a type of soul that is red with a purple core and covered with dark brown 'scales' on some parts of their surface. Although the appearance is the same, the size of Kishin Eggs seem to depend on the level of strength of the Evil human (the stronger the Evil human, the bigger the Kishin Egg).

The Evil humans also gain a new name, mostly named after famous or legendary characters in history, with Alcapone, Jack the Ripper and Rasputin already being examples. Meisters when approaching an Evil human with their Weapon when about to battle it, usually address them with this name. The Evil humans also sometimes possess a title, with Jack the Ripper being 'Serial Killer' and Lupin as 'Master Thief.'

The Evil humans also possess different levels of intelligence. Whilst some like Jack the Ripper are almost animal-like and driven to a mindless frenzy for power, some like Alcapone are devious and cunning, gathering associates to increase their power. Overall, all Evil humans seem to be capable of at least a small amount of speech.

However, all Evil humans share the same goal: to consume lots of human souls in order to become more powerful. This results in their homicidal and antagonistic behavior in order to consume innocent human souls (or even a Witch Soul in Alcapone's case).

Once on the loose, Evil humans are a threat to humanity in their quest for power. As well as the amount of innocent people that will end up killed in an Evil human's path, if the Evil human is left to thrive, it would transform into a very powerful Kishin, a being capable of submerging the world in fear and madness.

Therefore, the disposal of Evil humans is one of the main objectives of the Death Weapon Meister Academy in order to protect peace in the world and prevent a new Kishin from rising. The Academy trains Meisters, humans with powerful souls and Soul Wavelengths, with a Demon Weapon partner from a young age. The Meister and Weapon teams are sent out on assignments to kill Evil humans and obtain their souls in order to make their Demon Weapons stronger.

For a Weapon to become a Death Scythe, they must defeat and eat 99 Kishin Eggs (Death list souls on the manga) and one Witch Soul. Despite the large amount of evil human souls that are needed, this is often considered the easiest part of the job, as most of them resort to basic melee attacks that are easy to counter for a trained Weapon and Meister team. The Witch Soul, however, is considered the most difficult and has taken the lives of many Meisters, mostly as the Witch can know powerful magic attacks, and are considered immortal as well.

Strong Soul Humans
Among humans, there are few that possess a strong soul. Such a soul is uncommon and often held by a highly skilled individual.

One such human is Mifune, whose soul is valued at 99 regular human souls. Black☆Star and Tsubaki Nakatsukasa attempted to take Mifune's soul in order to avoid gathering 99 individual souls. However they let him go, after learning that he is protecting a child witch, Angela Leon.

Zombies
Zombies are individuals who have died and then brought back to life. Sid is the only known zombie and Stein is the only known person known to be able to turn someone into a zombie, although the exact procedure is unknown.

It appears as though, after someone has become a zombie, that person adopts a blueish skin tone, likely from the loss of oxygen in the blood stream. Despite this, Sid has shown to bleed red blood. The nose also becomes flat and piggish and the eyes lose their pupils. The mouth widens, prominently revealing the teeth. The hair seems to remain unchanged after the transformation.

Immortal Clan
The Immortal Clan is a group of people, like the name suggests, who are immortal. Their ability to live for hundreds of years suggests that many clan members still exist but so far, Free is the only known member to have been present through out the entire Soul Eater series.

Being part of the immortal clan appears to grant the person in question an immortal body, in that even significant wounds inflicted to such a body, last only mere moments. However, we can't be sure of this as Free is the only known member, meaning that such an ability may be unique to solely the werewolf bloodline. Maka speculated that her Witch Hunter might be able to purify/kill Free due to its use of her anti-demon Wavelength. This appeared to be true, as she was capable of using it to cut off Free's tail and it has yet to been seen since, suggesting the damage may be permanent however the other wounds caused by Maka's Witch Hunter did heal like all of Free's other injuries which did not seems to have been retained by Free for very long.

Witches
Witches are powerful beings and the natural enemies of Shibusen, as almost all of them have a destructive nature. Most witches featured in the series are based on a distinct animal and have some of their traits in both their personalities, fighting styles and appearances. Witches are also distinguished by their uniquely-purple soul.

Sway of Magic is a term used to refer to the naturally destructive instinct that occurs in both a witch and her magic. Almost all witches are influenced by this nature but there are a few exceptions. At a young age a witch's magic has not yet fully developed and so the sway of magic has yet to take hold, but as they grow older and their powers develop this destructive instinct strengthens. Witches who also use nondestructive magic are exempt from this influence but those who fall under this category are extremely rare, with Kim Diehl being the only one present within the series so far.

To make use of certain spells, most commonly when they are initially demonstrated within the series, numerous witches (and other beings capable of using magic) preform a specific mantra or chant preceding the statement of the desired ability. Each witch has her own unique phrasing that often pertains exclusively to their respective animal theme; for example Medusa Gorgon's mantra comprises entirely of words relating to her theme of snakes, being "Nake, Snake, Cobra, Cobabara".

Each witch has their own abilities that are as unique as their animal theme. However, all witches share a few common abilities.


 * Soul Protect: As the witches' soul wavelength can be easily distinguished by trained meisters, they developed an incantation named "soul protect" which conceals their presence, but renders them unable to use their powers unless the incantation is lifted.


 * Flight: Most, if not all, witches have the ability to fly. This done by simply floating in the air, or flying on a broomstick.


 * Spiritual Flexibility: There have been instances in which witches have a high understanding of soul wavelengths -- enough so that they can break their soul into small fragments and reform in due time, as emulated by both Medusa and Arachne.


 * Meister Capabilities: Although it is unlikely for a witch to partner with a weapon due to strife between them and Shibusen, it is feasible for a witch to use a weapon. Kim Diehl and Crona, for example.


 * Longevity: Witches, at least the powerful ones, appear to have incredibly long life spans. Medusa is known to have been alive 800 years before the start of the series. Even after eight centuries, Medusa still has the appearance of a young woman. Both Risa and Arisa confirmed that witches have a longer lifespan and so have more youth.

Cats
Cats are strange beings who possess nine souls and magical powers (although Blair is the only one who displays transformation habilities).

Gods
Gods are extremely powerful beings whom influence may be spread through the whole world with ease.

Shinigami
Shinigami or Death Gods are the most powerful beings of the entire Death World, their duty is to collect the souls of humans who turn into monsters by commiting atrocities to their kind. Death and Death the kid are believed to be the only shinigami existing, although kid was created from a piece of Death, which means that, originally, the shinigami was a unique being.

Kishin
Kishin or Demon Gods are beings created as the final result of a corrupted soul. A soul becomes corrupted when it devours pure human souls to gain power, usually as a means to escape fear, as a result, the person's soul deviates from the path of a human and begins to walk the path of a demon, becoming a "Kishin's egg" (Death list soul on the manga). The demon god's most fearful ability is its capacity of spreading Madness through the entire world.

The first kishin ever created, Asura, was ironically part of the group which was lead by Death himself to rid the world of corrupted souls, the Eight Powerful Warriors. Out of fear, Asura ate pure human souls that were not part of the Death list, he became so fearful, that he would soon eat his own partner weapon, Vajra. Asura was eventually stopped by Death and had his entire skin removed, his blood drained and used the same skin as a sack for his body. As a result of this, Death rooted his soul to Death City to keep Asura sealed and founded Shibusen to prevent the creation of any new Kishin.

Black Mass
The Black Mass is a unique being, made of madness. It gives power at the cost of one's sanity, reminiscent to the Black Blood. Its soul wavelength is very similar to a kishin's.

Fairies
Fairies are small winged elvish beings who are only seen so far dwelling inside Excalibur's cave.