Multiverse

The **Multiverse** (多元宇宙, *Tagen Uchū*?) is the collective sum of all possibilities of the universe, splitting off and manifesting as innumerable realities and existences. But its existence is not absolute, for it is born not out of some fundamental mechanic of reality, but rather through the choices of the people who experience it.

## Principles

The Multiverse is the collection of alternate universes which share a universal hierarchy. Each Universe in the Multiverse, as stated above, shares in common laws of physics, systems of nature, sets of elementary particles and all other laws of the parent Multiverse. However, since each Universe varies in initial conditions, the entire timeline is affected and entire cosmological structures are "reshuffled", so to speak.

According to Aiwass, there is literally a transfinite number, that is, a number greater than infinity of universes in the entire Multiverse. The Multiverse was further described as a boundless realm by Kischur Zelretch Schweinorg and Tengen herself corroborated the statement that there are infinite realities. The Multiverse has been described sporadically as a realm endowed with infinite levels of existence, whose quantity of extra dimensions stretches across the breadth of the conceptual infinity. The Multiverse even encompasses domains of existence beyond all time and space, transcending all levels of reality and dream.

### Parallel World

**Parallel Worlds** (平行世界, *Heikō Sekai*?) are alternate realities that co-exists separately from another within the Multiverse. Generally speaking, parallel worlds contain variants of the phases that make up any given reality. Because the Earth (and thus the universe it inhabits) is arbitrarily regarded as the nucleus of the reality it belongs to, the term "universe" and "dimension" are normally used as synonyms for "reality." The same applies to the terms "alternate reality," "alternate universe" and "alternate dimension" with regards to parallel worlds.

Parallel Worlds usually share many elements between each other, but they stand out by how they differentiate from each other. Parallel worlds can be different from each other in many ways and to different degrees. A large variety of these universes were originated as forms of divergence from other realities, where an event with different possible outcomes gives rise to different universes, one for each outcome. If two realities share the same backstory but one of them diverges from the other at a specific event, this reality is better known as an alternate timeline. Some can seem to be taking place in the past or future due to differences in how time passes in each universe. For example, in the prime *Toaru* universe, Kamijou Touma saved Index, but had his memories obliterated in the process. In the divergent reality of Universe 7767, he failed to save Index and retained his memories. As stated by Merlin, each potential world holds the same weight as all other worlds.

## Known Parallel Worlds

### Universe Prime

**Universe Prime** (ユニバース・プライム, *Yunibāsu Puraimu*?) is the main setting of the *Toaru Majutsu no Index* series and is the origin point where all time converges and all universes and worlds stem from. Tengen states that it is the the single ‘realest’ possible universe, from which all narrative energy originates. Zelretch believe that Universe Prime is the only world with the potential for a better outcome and has a strong possibility that the events here affect all other parallel worlds. The world's timeline can expand or contract like a rubber string, and as such it has a fair amount of unused space.

### Universe 1

**Universe 1** (ユニバース １, *Yunibāsu 1*?) is an alternate reality where the Magic and Science sides are at peace. In this reality, espers and magicians co-exist and the existence of magic has been fully revealed to the world.

### Universe 2

**Universe 2** (ユニバース ２, *Yunibāsu 2*?) is a world where Index never became the vessel for 103,000 magical books and never met Touma.

### Universe 3

**Universe 3** (ユニバース ３, *Yunibāsu 3*?) exists outside the wheel of time, and started after Othinus restored the world after warping it multiple times. In this world, Touma had succumbed to Othinus' torture and proceeded to kill himself.

### Universe 4

**Universe 4** (ユニバース ４, *Yunibāsu 4*?), also known as the **Scienceless World** (科学のない世界, *Kagaku no nai sekai*?), is a parallel world where the science side doesn't exist and the magic side dominates most of the world. In this reality, espers do not exist and instead, humanity relies on magic to guide them.

### Universe 5

**Universe 5** (ユニバース５, *Yunibāsu 5*?), also known as **Dinoworld** (ディノワールド, *Dinowārudo*?), is a parallel world where all humans never evolved and dinosaurs are the dominant species. As such, most of its inhabitants are dinosaurs.

### Universe 47

**Universe 47** (ユニバース４７, *Yunibāsu 47*?) is a parallel world where all of its inhabitants are genderswapped. This is the home reality of Kamijou Touka and Aleis-tan.

### Universe 166

**Universe 166** (ユニバース １６６, *Yunibāsu 166*?), also known as **Pillow World** (枕世界, *Makura Sekai*?), is a parallel world where the whole world and its inhabitants are made entirely out of pillows, blankets, and bedding. The sky is entirely made of one sheet with cloud print. Hills and mountains are great rumpled quilts. Houses tend to be made of stacked cushions and pillows. Animals and trees are made out of pillows. There are pillow world counterparts of various characters.

### Universe 625

**Universe 625** (ユニバース ６２５, *Yunibāsu 625*?) is a parallel world where Touma willingly uses the Imagine Breaker's full potential and has become corrupted by it. In this reality, Touma has conquered both the magic and science sides and controls the population of espers and magicians to dominate the world. There are several changes between Universe 625 and Universe Prime; Accelerator succeeded the Level 6 Shift Project and has achieved SYSTEM, a vast majority of the Misaka clones have been wiped out because of this.

### Universe 1218

**Universe 1218** (ユニバース １２１８, *Yunibāsu 1218*?) is a parallel world where Touma and Accelerator were raised by Aleister Crowley in England. In this world, Academy City never exists and Aleister did not betray the Golden Dawn.