In Bleach, death is merely the beginning, as one's soul can be sent to various spirit realms. These realms, each with their own unique set of rules, not only exist independently but also have intriguing interconnections. The ultimate destination of a soul greatly influences the quality of their afterlife, making it crucial for Soul Reapers to fulfill their duty of guiding spirits to the Soul Society.
Throughout the series, Ichigo and his friends stumble upon these spirit realms as the plot demands, suggesting the possibility of more realms beyond those depicted. Nevertheless, Bleach prominently features four major planes, each harboring distinct inhabitants, regulations, and ambiance. Let's delve into what these realms are, why they hold significance, and how one can traverse between them.
1 The Soul Society
The Soul Society, frequently portrayed in the series, is a spiritual realm where the souls of virtuous humans reside after death. It serves as the home for the Soul Reapers and various other spiritual beings. In Bleach, the focus is primarily on the Seireitei and its surrounding city, which make up a significant portion of the expansive Soul Society. Life in the Soul Society mirrors that of Earth, although individuals are no longer susceptible to death from causes like starvation. The social structure of the Soul Society consists of affluent families with esteemed lineage and impoverished slums, as exemplified in Rukia's backstory. Unlike ordinary matter, everything in the Soul Society is composed of Reishi, which are spiritual particles.
Considering the Soul Reapers' presence, it is evident that the Soul Society holds great significance. Accessing the Soul Society can be achieved through various means. For a Plus, a Soul Reaper can utilize the Konso ritual to send them directly to the realm. Even Hollows can find absolution for their transgressions through this ritual, but only for misdeeds committed after their transformation. Soul Reapers possess a unique method of traveling between realms by utilizing Hell Butterflies to open a portal known as the Senkaimon. Those without authorization can potentially enter the Soul Society through a perilous border region referred to as the Dangai Precipice World, but further details about this will be discussed later.
2 Hueco Mundo
Hueco Mundo serves as the primary realm in the Hueco Mundo arc, existing between the World of the Living and the Soul Society. It is a desolate land of perpetual darkness, where featureless deserts stretch endlessly. The prominent location within this realm is Las Noches, functioning as its central hub and the sole place exhibiting any form of structure. Life in Hueco Mundo is characterized by terror, with Hollows preying on one another as fervently as they do on humans. Hollows who amass significant power through this vicious cycle can transform into Arrancar, spirits who possess the traits of both Hollows and Soul Reapers.
Spirits find themselves in Hueco Mundo if, during their previous lives, they harbored significant regrets that prevented them from progressing to the Soul Society. Gradually, they undergo a transformation from Pluses into Hollows, a phenomenon demonstrated by Orihime's brother. Hollows possess the capability of traversing between realms by opening portals known as Garganta, enabling them to move through the void connecting different worlds with relative ease. Although some of these portals lead to the Soul Society, most Hollows possessing this knowledge exercise caution and refrain from venturing into that realm. Hueco Mundo stands as a realm abounding in spiritual energy, allowing even the weakest of Hollows to sustain themselves without relying on encounters with humans.
3 Hell
Hell is a unique dimension exclusively reserved for the most morally corrupt souls. These individuals, who displayed wickedness during their human existence, are condemned to Hell as a form of punishment. Additionally, Arrancar and Soul Reapers may also find themselves in Hell if their power was excessively immense or their sins were exceedingly numerous. There is limited knowledge available about Hell, as it was primarily explored in the disputedly canonical fourth installment of the Bleach film series, known as Hellverse. Within the confines of the official storyline, Hell is inhabited by rare Hollows referred to as "the Beasts of Hell," which possess no spiritual pressure and are consequently highly perilous.
When a being is banished to Hell, two colossal doors adorned with skeletal figures materialize, which open up and forcibly drag the guilty spirit inside. Unlike the other realms, Hell cannot be traversed by anyone, including Soul Reapers, at will. Once a spirit enters Hell, it becomes exceedingly difficult for them to escape, at least for any substantial period. The environment of Hell has the potential to induce profound transformations in the spirits inhabiting it, permanently altering their physical appearance and abilities. While souls in the Soul Society eventually undergo reincarnation on Earth, those consigned to Hell are denied the opportunity for a second chance, forever precluding them from participating in the cycle of rebirth.
4 Dangai Precipice World
The Dangai, also known as the last relevant realm, serves as a border region between the Soul Society and the World of the Living. It takes on the appearance of an infinite pathway and exists outside the constraints of time and space. Inside, time moves swiftly, with hours passing in mere minutes outside. Despite its seemingly simple corridor-like structure, the Dangai harbors a tumultuous flow of spiritual pressure and energy capable of overpowering any soul attempting to traverse it. Notably, the Kototsu, a patrolling object, possesses the ability to destroy anything it comes into contact with.
Although the Dangai can be accessed from either the World of the Living or the Soul Society, a Senkaimon portal is necessary for entry. Due to its inherent dangers and lack of substantial presence, there is little reason for any individual, be it a Soul Reaper, Human, or Hollow, to linger within its confines. However, Aizen found it to be the perfect setting for his nefarious plans, successfully kidnapping Orihime while she was making her way through the treacherous expanse of the Dangai.
This encompasses all four major spirit realms in Bleach. Occasionally, smaller pocket dimensions like the Valley of Screams, found branching off from the Dangai, or the Soul King's realm, linked to the Soul Society, emerge, but they are infrequent. These spirit realms are captivating locations that are intricately crafted, igniting engaging discussions among fans. Gaining an understanding of these realms, their interconnections, and workings can greatly aid in following the events in Bleach.