Souls

**Souls** are an extremely prevalent and well-known part of sentient beings throughout the Multiverse. However, not everything is known about them. While some souls are known in many AUs, some others have yet to be discovered or are unknown of most. If they can be a source of power in a lot of cases, they also are a weak point to any being who has one. Though most people only know the most prevalent souls, being *determination*, *patience*, *bravery*, *integrity*, *perseverance*, *kindness*, *justice*, and *Monster souls* as well as *Boss Monster souls*, other ones exist, which are called *partial souls*, *combined souls*, souls affected by *soular heterochromia*, *special souls* and *perfect souls*.

## Normal souls

**Normal souls** are the souls that exist in almost all Undertale AUs, and exist in the Undertale universe itself, and are thus considered the normal standard for souls. Those are the *determination souls*, *patience souls*, *bravery souls*, *integrity souls*, *perseverance souls*, *kindness souls*, *justice souls*, *Monster souls* and *Boss Monster souls*. The Boss Monster souls and determination souls are inconsistent though, as the properties of the former may change from AU to AU, and the name, maybe even the properties of the latter may also change from AU to AU. Monster souls may also not exist at all in some AUs, and the Monsters may have the other normal souls, or even souls unique to the AU. They are given at birth, and usually can only change through external influences, except in specific AUs.

### Determination souls

****Determination souls**** are the most well-known souls by the Out!Codes, often seen within Frisks and Charas in Undertale and its AUs, though they can appear in other beings. As this name suggests, a being with a determination soul will have more determination than a normal one, giving them the access to the ability to SAVE, LOAD and RESET in many cases. Absorbing multiple determination souls has also been proven in certain AUs to grant the ability of foresight, and even granting stronger and new abilities. A common theory suggests that this is possible even without absoring the determination souls themselves, and instead absorbing determination only.

Known bearers:

* Before!Chara
* Choco
* CJ!Frisk
* Classic!Frisk
* Crisk
* Dust!Frisk
* Entropy!Frisk
* Fake!Chara
* Fell!Frisk
* Great!Chara
* Ice!Chara
* Ice!Frisk
* Katelyn Turner
* NewLie
* Outer!Frisk
* Souls!Chara
* Swap!Chara
* Xéno!Chara
* Xéno!Frisk

### Patience souls

****Patience souls**** are some of the most common souls among individuals, though it is more often than not seen alone, from someone who died beforehand. Patience souls do not make user more patient or robust, but instead let them see a bit in the near future, which notably serves to dodge the enemies' attacks and eventually counter-attack.

Since it does not happen in the Undertale universe, the way someone is affected by the patience soul changes from AU to AU. In Xénotale, it prevents the victim from seeing any color that is not near them. This makes them see everything in black and white, and prevents the possibility to see colored attacks, unless they are near, making those attacks very difficult to dodge.

Known bearers:

* Great!Sans
* Soular knight of patience

### Bravery souls

****Bravery souls**** are some of the most common souls among individuals, though it is more often than not seen alone, from someone who died beforehand. Bravery souls increase the speed of its bearers, often allowing them to attack faster, dodge better or just go from one place to another faster, though it is not an extreme upgrade of the speed. It is theorized to be common among athelts, due to its speed advantages.

Since it does not happen in the Undertale universe, the way someone is affected by the patience soul changes from AU to AU. In Xénotale, it acts like a pseudo-Anti-world, as someone that has its soul turned orange will be protected from damage when they stay in an enemy attack, and will be dealt damage if they avoid them.

Known bearers:

* Soular knight of bravery

### Integrity souls

****Integrity souls**** are some of the most common souls among individuals, though it is more often than not seen alone, from someone who died beforehand. Integrity souls allow to be more resistant to attacks, and thus allow to stay in a fight for a longer time. This equals to an increase of the defense stat in coded universes. The increase is not extreme, yet stays noticeable. However, this soul can be useless against very strong attackers.

When someone "turns blue", their soul turns into an integrity soul, but when it happens, instead of having the normal effects of having an integrity soul, it usually sticks them to the ground (though it allows the one with the soul to jump), and in some AUs allows someone else to manipulate their gravity. Turning someone's soul into an integrity soul isn't needed in some AUs.

Known bearers:

* Soular knight of integrity

### Perseverance souls

****Perseverance souls**** are some of the most common souls among individuals, though it is more often than not seen alone, from someone who died beforehand. Someone with this soul will usually be more robust, and thus allow to stay in a fight for a longer time. This equals to an increase to the HP stat in coded universes. They can bear more physical shocks and attacks than people with other souls, as well as more violent ones, thought it is not an extreme upgrade of their robustness. This soul can be very useful to people that have a body that does not naturally resist a lot, but may also be detrimental against strong attackers in this case. For such people, an offensive soul would often be better.

When someone "turns purple", their soul turns into a perseverance soul, but when it happens, instead of having the normal effects of having a perseverance soul, it usually restrains them from moving in most places. When it happens and that they go from one place to another one far enough, it can always be seen by the one who turned their soul into a perseverance soul, but the person who does that teleport themselves to that place, which can be used for quick travel.

Known bearers:

* Soular knight of perseverance

### Kindness souls

****Kindness souls**** are some of the most common souls among individuals, though it is more often than not seen alone, from someone who died beforehand. A bearer of this soul will heal faster from their injuries, and though it isn't an extreme upgrade of their ability to heal faster, a great difference has been notified between the ones with this soul and the ones without. Depending on whether the universe is coded or codeless, the way the heal works may be different. In codeless universes, it will always heal physical injuries, while it may heal HP in coded universes. In the case of the latter, it may also heal physical injuries from time to time. People with kindness souls are also known to be capable of healing from diseases faster than most other individuals.

When someone "turns green", their soul turns into a kindness soul, but when it happens, instead of having the normal effects of having a kindness soul, it makes them stand still, though a person with that effect can still move their arms, hands, and face. When an Out!Code sees this happening, they often see the person that has this effect given having a kind of shield, though it is never provided with the turning of their soul. Having the ability to turn the soul of another into a kindness soul is considered one of the most dangereous commonly seen abilities.

Known bearers:

* Neime
* Soular knight of kindness

### Justice souls

****Justice souls**** are some of the most common souls among individuals, though it is more often than not seen alone, from someone who died beforehand. A user of this soul will normally attack stronger than people without this soul, and it usually seems natural to the person with that soul. This equals to an increase of the attack stat in coded universes. Like most of the other most prevalent souls, it doesn't give an extreme upgrade of the strength of its user's attacks.

When someone "turns yellow", their soul turns into a justice soul, but when it happens, instead of having the normal effects of having a justice soul, it doesn't look like it has any effect at first. But in fact, someone whose soul turned into a justice soul can shoot projectiles -which looks have multiple interpretations- from their soul. When this happens, it is often seen as only an advantage, and as such, most of the time, the one turning the soul of another into a justice soul is an ally.

Known bearers:

* CJ!Chara
* Soular knight of justice

### Monster souls

****Monster souls**** are the most common souls among individuals, as it is seen in each Monster existing in many AUs, as well as in the Undertale universe itself. This soul is seen as the weakest soul by most people, as its only effect is that in most cases, it weakens the individual that has it, and a bearer of this soul will die from having determination. The reason some don't is still unknown. It is often believed that these souls are composed of love, hope and compassion, though it is wrong. Unlike the previous souls, they disappear after death or once extracted from an individual, to never reappear again, unless precise magic or science is used during the killing or the extraction. Their extraction also kill their owners more often than any other soul. This also usually makes impossible to turn a Monster soul into a perfect variant of itself.

Known bearers:

* Most Monsters in most AUs

### Boss Monster souls

****Boss Monster souls**** are among the normal souls, and are usually seen among the Toriels and Asgores of most AUs, and sometimes in the Asriels, though it can appear to others. Those souls are mysteries, as their effect is inconsistent from one AU to another. In some AUs, it grants eternity as long as its owner does not procreate. In other AUs, it can be transferred from one generation to another. In rare AUs, they are just stronger Monster souls, though they do not give such a big boost as the Human souls. The most consistent effect that it gives in AUs is that it can persist a few seconds after death. Boss Monster souls are undistinguishable from other Monster souls without prior knowledge, or without the death of its owner.

Known bearers:

* Alternate!Asgore
* Alternate!Asriel
* Alternate!Toriel
* Classic!Asgore
* Crrraappy!Chara
* Error!Asgore
* Fell!Asgore
* Outer!Asgore
* Swap!Asgore
* Toriel the Survivor Seeker
* Upsilon!Asgore
* Vĕdomi!Asgore

## Partial souls

**Partial souls** are variations of the normal souls that are incomplete, usually being half of the normal soul, though other percentages can be found in rare occasions. They usually give only a part of the effect of the normal soul, akin to Monster soular heterochromia.

### Half-determination soul

An **half-**determination**soul** is a partial soul, which doesn't have the same effect as a normal determination soul. Though it still allows its user to reset, it isn't a complete reset. It only brings everyone back at their position, but without erasing any of their memories.

Known bearers:

* XGaster

## Combined souls

**Combined souls** are a special kind of souls, that combine one kind of soul and another kind of soul. The difference between a combined soul and a special soul is usually determined by an AU-to-AU basis, though the general consensus is that any soul that combines two or more of the normal souls is a combined soul. However, most of the combined souls that combine at least one soul that is not a normal soul with another, whether it is a normal soul or not, are considered special souls. Usually, these souls are created artificially, though a few AUs have these souls appearing naturally. Even then, those cases are usually rare in such AUs.

### Melange soul

The ****m****e****l**a**n****g****e** soul** is a soul that can't appear naturally, and that needs to be artificially created and inserted into someone. To create it, someone needs to take pre-existing souls, all of a different type, and to combine them artificially. The only known example of this, which is known by only a few, is Alphys's quick version of it in Xénotale. This attempt used all of the six human souls guarded by her Asgore. It allows for its owner to have the effect of the patience, bravery, integrity, perseverance, kindness and justice souls, as well as the ability to get the determination the six soul fragments had in themselves, possibly allowing for the determination of six entire souls. However, this gives the general power boost of a normal Human soul.

Known bearers:

* Xéno!Alphys

## Souls affected by soular heterochromia

**Soular heterochromia** is a disease of the soul that is considered weird, though not always detrimental. It is characterized by the soul having two colors on itself due to specific causes, yet without being a combination of two pre-existing souls. There are two types of soular heterochromia, being *Monster soular heterochromia* and *Human soular heterochromia*.

* **Monster soular heterchromia** is extremely rare, as it is said to occur once in one thousand AUs in average, and every person seen with it tends to be studied. It may not even be known before the Monster's death. Such souls are always half-white and half the color of a normal soul, and any other similar soul is considered either a combined soul or a special soul. They are turned in the way of a normal Monster soul. It is impossible for the white part to be a Boss Monster soul. Such souls seem to be easier to find in AUs created by external influences. Those souls are only obtained at birth.
* **Human soular heterochromia** is more common, yet still rare, but can be found multiple times in an AU, and can be expected in any AU, even though most AUs do not have it. Such souls can only be attained when a Human has a personality trait that is the opposite of what the normal soul they bear is called. Thus, unlike for Monster soular heterochromia, it is impossible to have Human soular heterochromia with a determination soul, since the power this one cannot be related to a personality trait. It is theorized that the normal souls are actually named after soular heterochromia in some AUs, even though this is wrong Multiverse-wise. The souls can't return back to normal, and a Human with a soul affected by soular heterochromia will always keep the personality trait the soul is associated with. When the owner dies, the soul stays affected by soular heterochromia, and anyone that absorbs it will get the personality trait. Those souls have the inverted color of the base soul for most of it, with the outline of a color of the normal soul. Due to the nature of these souls, people adapt their behavior and beliefs towards the person with such a soul if they know of it.

### Half-monster half-determination souls

****Half-monster** **half-determination** souls** are a type of soul affected by **Monster soular heterochromia**. These souls allow monsters to naturally get determination, to stand it, and to get its positive aspects, such as coming back from death, but incredibly rarely SAVing, LOAding or RESETing. A Monster with soular heterochromia has yet to be seen with this power. The full extent of the power of these souls isn't known even by most Out!Codes, as its bearers tend to not be found by them or to not know that they have it. Those souls are theorized to be capable of the same powers as determination souls.

Known bearers:

* Xéno!Undyne

### Deceit souls

****Deceit souls**** are a type of soul affected by **Human soular heterochromia**. These souls can only be found on people who originally had a integrity soul, but whose personality is the opposite of someone who has a tendancy to say the truth. As such, these are usually found in liars and manipulative people, that tend to rarely say the truth, and only when it is necessary or very useful. They are often incredibly good at lying or hiding their emotions. They also are good at abusing the laws. People with this soul usually want to hide its existence, as it can ruin their cover. This soul has the same effects as integrity soul for the person who originally turned their integrity soul into this one.

Known bearers:

* Nashi Masuku
* Trevor Kingsman

### Reluctance souls

****Reluctance souls**** are a type of soul affected by **Human soular heterochromia**. These souls can only be found on people who originally had a perseverance soul, but whose personality is the opposite of someone who continues to act whatever happens. As such, these are usually found in people that are reluctant in doing things, and that quickly abandon projects because they are too difficult or too long. Such people usually either have an extreme ambition but do not do anything for it, or entirely lack ambition. They usually doubt of the usefulness of making efforts to attain their goals. This soul has the same effects as perseverance soul for the person who originally turned their perseverance soul into this one.

Known bearers:

* Cross!Chara
* Cross!Sans

### Prejudice souls

****Prejudice souls**** are a type of soul affected by **Human soular heterochromia**. These souls can only be found on people who originally had a justice soul, but whose personality is the opposite of someone who has a powerful desire of seeing the right thing happen. As such, these are usually found in people that have no respect in laws, and that are selfish. Such people usually do not stay with a LOVE of 1 at the end of their life. A normal profile for a person with this soul would be a person who is obsessed by the idea of fulfilling themselves on all of life's petty pleasures. People with this soul usually want to hide its existence, as it can ruin their cover. This soul has the same effects as justice soul for the person who originally turned their justice soul into this one.

## Special souls

**Special souls** are a special brand of souls, as they are the polar opposite of the normal souls, hence their title of special souls. Each special soul is usually found in a single AU, though some can be found in multiple AUs. If a special soul is found in multiple AUs, its effect is usually inconsistent from one AU to another. They are the most versatile brand of souls, as they can be anything without any kind of restriction. Full artificial souls usually go there. Some souls may be natural in an AU and may go there. However, a combination between a normal soul and a natural soul for an AU may be classified as a combined soul, but will be classified as a special soul if the special soul itself is unnatural. Partial versions of special souls also go there.

### Soul of Celerity

The ****soul of Celerity**** is a soul artificially created by Zeno to be inserted into Celerity!Sans and to make him even more powerful than he was before he got it. The way he created it is by turning the polychromatic quarter of his original soul into a full soul, then by giving it properties via his magic. Not only it allows to have better reaction time, allowing to see movement at the speed of light/information, but also extremely enhances the power of the abilities of people that have a speed of 299792458 meters per second, as well as enhance people capable of achieving this speed themselves. This soul is known to be one of the most powerful souls in the entirety of the Multiverse. It is also immune to any form of soul modification and most forms of soul watching, since it used to be a part of Zeno's soul.

Celerity!Sans can turn someone's soul into this one, though it can only be for ten seconds. During this time, the person who got this effect will not have the normal effects of the soul, but instead will just get a speed of 299792458 meters per second, and will not have any control of it unless they had control of this speed beforehand. They also will go through any gas, and will not need to breathe to survive. Someone having their soul turned to this soul prevents the soul from being turned into any other soul during the ten seconds.

Known bearers:

* Celerity!Sans

### Fiberglass soul

The ****fiber****glass** soul** is a soul that is at the same time white and blue, and that may be confused with soular heterochromia for untrained eyes. However, it does not give the same effect as a Monster soul or an integrity soul. This soul has the very powerful effect of getting the user immune to any magic, excluding code manipulation if they are coded, and themself's. They also have a lattency on teleportation-like magic, as they can be teleported but will get an immunity to everything after the teleportation, unless they do it themself. If this soul is merged with any other soul, it loses its effect. However, due to the fusion being a magical process, it can only be done by the user of the fiberglass soul.

Known bearers:

* Error404!Sans

### Soul of Opposition

The **soul of **Oppos****ition**** is a soul artificially created by G to be inserted into Opposite!Sans and to stabilize the newfound powers he got from his determination, bravery and patience injections. It allows to naturally give the power of opposition without any drawback, a power that allows to get their HP, attack and defense stat inverted, usually to become negative for coded beings. Codeless beings, however, would just have a nullification of damage. The power it gives can be bypassed and this soul can be manipulated.

Known bearers:

* Opposite!Sans

### Chaos soul

The ****Chaos soul**** is unlike many other souls in many AUs, as it is not made out of matter, and is merely a force, created by Chaos, the W.D. Gaster of Chaostale. However, as it exists, it has been divided into two equal fragments, that Chaos gave to its two sons. While the power of the full Chaos soul is unknown, it is known that the two wielders of the Chaos soul fragments can communicate via telepathy from anywhere in the Multiverse, are immune to any Void effect, and can't die as long as the other does not die at the same time, basically linking the lives of the two users. Users of the Chaos soul are immune to any soul alteration.

Known bearers:

* Aether
* Erebus

### Anomaly soul

The ****anomaly** soul** is a soul that can vary in color and form, and can also vary in effect. However, the most consistent part of it is that it can only be found in what are considered "anomalies" in AUs, and thus are usually found in coded universes.

Known bearers:

* G

### Curiosity soul

The ****curiosity** soul** is one of the most common special souls to exist in the Multiverse, and one of the most versatile in effect and color. In some AUs, the curiosity soul simply affect the personality of the individual, making them curious, and can even be a common soul to get at birth. A recently recorded version of the curiosity soul is very dependant on its individual and its knowledge. This recent version has the power to get an equivalent of 70% of the power effect of any soul the bearer of the curiosity soul knows of, though it needs to be told by an owner of the soul themself.

* Known bearers:
* Upsilon

### Jealousy soul

In Cheattale, the ****jealousy** soul** is a corrupted, twisted version of the kindness soul, that can only be found in people that have a great jealousy inside them, but that originally had a kindness soul. This grants them emotion-based powers, especially based on the emotion of jealousy. People with that soul tend to not go back to the normal state of their soul, but have in exchange a new form called Jealousy, which is a complete other form, activated when the jealousy takes full control over its user. This transformation make them have a new personality. This state of the user can be canceled by destroying the aspect it is jealous of or by knocking it down.

Known bearers:

* Psyka

### Rebirth soul

The ****reb****irth** soul** is a prototype of soul created by the Gaster of Soulstale, purely existing for life usefulness, and as such, grants power as intended. It grants a good regeneration ability, an immunity to poisons and sicknesses, an ability to reincarnate after death as long as a part of the body or the soul stays after the death, and an ability to create abilities to counter that of the user's opponents, though this one is limited to one ability per day. However, as the user obtains the rebirth soul, it eventually gets a new consciousness and personality, being that of the rebirth soul itself. This consciousness can't be changed by soul extraction, but can be modified a bit by absorbing a soul affected by soular heterochromia.

Known bearers:

* Souls

## Perfect souls

The **perfect souls** are a relatively unknown type of souls, and are artificial augmentations of pre-existing souls, whatever the type of the soul may be. This means that even perfected versions of special souls are classified here. Perfect souls are dangerous to create without mastery, and may result in the destruction of the base soul. However, if it succeeds, it grants improved version of the abilities of the base soul, or even new abilities. A lot of theories surround these souls, and they are the rarest souls to see to this day, even more rare than Monster soular heterochromia, due to how only a few people know how to make these souls.

### Perfect rebirth soul

The **perfect **reb****irth** soul** has been created by the Riverperson of the Multiverse through an unknown process, and is an enhanced rebirth soul by all means. It turns the red part of the rebirth soul into a gold part. As it is intended, it grants improved version of the abilities given by the rebirth soul, being an improved regeneration, an immunity to poisons and sicknesses, and an access to three new abilities per day instead of one. It also lets the owner choose between a resurrection and a reincarnation when they die, the resurrection being almost instantaneous, and without memory loss. As it is a modified rebirth soul, it gives the same consciousness as an unmodified rebirth soul, meaning its user can improve it without any risk of losing their personality.

Known bearers:

* Souls

## Trivia

* The forms of Human soular heterochromia were taken from Undertale Rho, specifically the inverted TRAITs in it.
* Absoring multiple souls isn't considered as having a combined soul or a special soul, as the multiple souls tend to coexist in the AUs. This is why Asriels tend to not have such a soul classification.