Tengen

**Tengen** (天元, *Tengen*?), often referred to as **Master Tengen** (天元様, *Tengen-sama*?), is a supporting character in the *Toaru Majutsu no Index* series. She is a powerful magician turned cosmic entity who maintains the balance of magic and all magic-related affairs, making her the de-facto ruler of the Magic Side.

Master Tengen is also known as the "**Star**" (星（ほし）, *Hoshi*?). At one time, she was responsible for preaching the foundation of magicians and ended up spawning religious groups that worship the Star as their deity.

## Appearance

Tengen looks very much like a normal human being, exception being her arms which look more like coral sprouts that pin her to the ground. She has long blonde hair and alabaster skin. She wears a kimono made of unknown material.

## Personality

Tengen appears as a well-mannered, straightforward, and knowledgeable individual with humanity's best interest in mind. She doesn't seem to mind awkward questions about her experience and is more than happy to help normal magicians or even humans given the right situation. Due to her omniscience and great power, Tengen is rather indifferent and lackadaisical and will not take things seriously most of the time. However, despite her virtually infinite power, knowledge, and influence, she is extremely considerate and humble, not seeing herself as a god at all.

Furthermore, as shown 1000 years ago, Tengen also has a softer and kinder side to herself. At first, she shows little to no emotion towards the realities she was presenting, which Kamijou Touma accused her for, but gradually began to show empathy towards those she observed, even admitting that one which Kihara Seisuu eliminated all life broke her heart. According to Aiwass, Tengen places extreme importance on the preservation of life, deeming it the most precious thing that is worth protecting.

## Background

Tengen's full background is largely unknown but it is hinted that she was associated with Aiwass and the Secret Chiefs at some point. She also met Kischur Zelretch Schweinorg and helped him establish the Global Occult Coalition.

## Abilities

Tengen is an extremely powerful being who is viewed as an immortal entity and a pillar of security within the magical community. Tengen's abilities are essential to the structure and organization of the magic side. She has existed for centuries and are responsible for teaching the very foundations of magic that eventually evolved into the modern-day culture surrounding it. She is able to drastically change her surrounding. Tengen herself managed to create a whole forest made of limestone.

Due to her direct connection to the Root, Tengen has vast reality warping abilities. She claims to able to do anything she wishes, as being connected to it makes her an equivocal existence and have a equivalence to a transcendence of abstract level of existence. She can manipulate the past, present, and future across large temporal distances and with a profound knowledge of the causal effect her actions will have.

### Boundary Manipulation

Tengen's main magic allows her to manipulate any and all boundaries. The most common application of her boundary manipulation magic is opening "gaps" which act as portals between two places. She can create gaps through which only she can pass, or through which anything can pass. She can use these gaps to get items from other universes and attack her opponents with items from within them. Tengen can also use them to attack opponents directly, fire danmaku, and even open them within her opponents to split them apart.

Aside from that, Tengen can also control boundaries in a more general sense. Since the nature of all things is defined by its boundaries - for example, a lake can only exist as it is because there is a boundary between it and the atmosphere, the surface of the water itself. Tengen’s magic can, be used to achieve a considerable amount of different effects. She's described to be capable of manipulating the boundary between all things, but there are several exceptions to her power. She is known to be able to manipulate several fundamental boundaries, however, such as the boundaries between truth and falsehood, reality and fantasy, human and demon, slave and master, life and death, awake and asleep, day and night, or winter and spring.