Spirits

Spirits arise from deceased entities such as humans or animals. Spirits result from the consciousness of the mind being able to attach itself to mana upon leaving its mortal form, resulting in most spirits resembling their old selves, especially at the time of their deaths. In the original realm of reality, there was no passing on to any sort of afterlife because it simply did not exist yet. Upon the original realm being split into 3, spirits were able to pass on into the Spirit Realm, in fact, many of them ended up going as a result of its creation. However, there are a lot fewer spirits that exist from modern souls as a result of Yahweh converting them into power. Souls that believed in the Judeo-Christian God upon their deaths end up being converted into power for Yahweh. This ceased after his permanent demise in Two Sides of a Coin 3. As a result of being made of mana, normal humans, which are incapable of seeing mana, can not see spirits.

Spirits
The result of a dead human or animal. They usually resemble themselves at the point of their death (however, usually seconds before their death/injury). If an entity dies as a consequence of a curse, they will become a cursed spirit (i.e. if they have died due to interacting with a cursed object, or they died because something killed them while the area they died in was under the influence of a curse). If they do not pass on to the Spirit Realm on their own because they feel obligated to remain, they are classified as a Bound Spirit, though no changes occur to the spirit. Should a spirit end up holding a terrible grudge, they will be classified as a Vengeful Spirit. Unlike bound spirits, Vengeful spirits do have physical changes to their form. They resemble how they did when they died, wounds from their death being evident (i.e. a Teke Teke would lack their lower torso and legs since they died from being cleaved in two). A cursed spirit can be mistaken for a vengeful spirit because cursed spirits also possess the wounds they gained from dying (i.e. a certain cursed spirit will still have claw marks, a missing eye, torn flesh, and a few missing fingers, even though he is not a vengeful spirit).

Guardian Spirits
Strange entities within the Two Sides of a Coin world. While some can become a Guardian Spirit upon death, most Guardian Spirits are descendants of the human and spirit pairings that resulted from humans getting stuck in the spirit realm upon the world's split. Unlike other spirits, they are tangible yet mostly invisible to the living, though they do have the power to construct a human form, with which they can be seen. Guardian Spirits can be identified by the odd black lines that go from the corners of their eyes to their jaw, as well as their pale pupils that can take a pale (purple or light gray) or completely white coloration. These spirits have a unique ability, due to their human born origins, to enter the minds of others, as well as break or lessen the effects of curses with their presence. They also have the ability to heal others, enough to keep them alive with their presence. They have the ability to follow souls as well, in the event that a soul ends up in a different realm than their still-living body.

Cursed Spirits
A cursed spirit is the result of someone who died as a result of a curse. In cased of something such as a death curse, these spirits are unable to pass on until the curse on what cursed them is broken. Spirits who died as a result of a location curse may return to life soon after as twisted beings that lack human flesh on their skin, their face becoming a void-like black with bleeding facial features. These spirits will pass on and disappear once the curse of the cursed area is broken. Or they might become aggressive and hostile Tsukumogami. Cursed Spirits who end up being revived by a location curse, instead of being killed by it, will not pass on once the location curse is broken, but they will return to their deceased state as a spirit. Cursed Spirits are unable to become vengeful spirits until their curse is broken, nor can they enter the Spirit Realm. Normal spirits can also be revived by a curse and may behave similarly to a vengeful spirit due to the curse's influence.

Bound Spirits
Also known as earth-bound spirits. These spirits are bound to the mortal realm because of unfinished business of some kind. Perhaps they are watching over a loved one, perhaps they are seeking aid for something. Perhaps they are trying to tell someone what happened to them. Be it vengence or righting a wrong, these spirits will not leave the mortal realm until their unfinished business is complete. These spirits have the most potential of becoming Vengeful Spirits.

Vengeful Spirits
A vengeful spirit is extremely dangerous, as they have they are doomed to become a Spirit Demon or a Tsukumogami. These spirits have a grudge of some sort and are malicious. They will possess things to try and hurt others, or they make it their goal to terrify others. A spirit that has become a vengeful spirit will succumb to their dark desires of hurting others, their own emotions turning against them as their mind slowly breaks. Once a Vengeful Spirit finally snaps from something (death of a loved one, shocking discovery, the regret of killing someone, etc.) they will become a demon, taking on a much different form and will go on a rampage.

Spirit Demons
Spirit demons are the result of vengeful spirits that have become corrupted with their own negative emotions to the point of becoming a demon. Spirit demons, similar to their Vengeful spirit versions, usually haunt the mortal realm. These demons retain their intangibility, however, that can regain their tangibility at the temporary cost of their intangibility (if they are hunting someone, they become solid in order to hurt them/interact with things, leaving a window of time where they can be hurt and killed/sent back, when in 'spirit' form, they escape the dangers of threats by becoming untouchable but they can't touch anything either). Unlike vengeful spirits, they are able to attack the living themselves, and can interact with the physical realm without having to possess it (also making them unable to become Tsukumogami). Not all Spirit Demons result from Vengeful Spirits, as spirits such as Ubume (spirits who died from giving birth) can also become demons, giving them the ability to take care of their loved ones long after they have passed. For this reason, it is believed that human born demons might be a result of a strong desire to live, no matter how twisted.

Tsukumogami
Not all Tsukumogami are demons, and not all of them come from spirits. While an object can age to the point of becoming a demon known as a Tsukumogami, thus gaining consciousness, it is true that all spirit-born Tsukumogami are born as a result of a vengeful spirit. A vengeful spirit runs the risk of becoming a Tsukumogami should they possess something, potentially getting their soul stuck to the object. In a good portion of cases, a vengeful spirit that has become a Tsukumogami will become stuck to the same kind of object that killed them. While stuck to the object they are unable to complete their transformation into a Spirit Demon and instead will eventually become a demon Tsukumogami, their consciousness fusing, absorbing, or overpowering the consciousness of the newborn Tsukomogami.

Shades
A strange kind of spirit, born from witches, and warlocks. Most of them are like shadows. They still posses some degree of magical ability though they lack any resemblance of their living selves with the exception of their silhouette.