Aura

Aura (オーラ) is a particular force produced within all living beings, usually pouring out of their bodies in varying amounts.

Properties
It is a special energy with many practical uses. In combat, the most basic and common application of aura is to enhance one's physical abilities like power, speed, and durability, with varying results depending on the quality and amount of aura within a person, while also taking their proficiency in controlling it into account. Likewise, aura can also be applied to equipped gear to increase their performance beyond normal. In practice, this results in superhuman feats without the aid of Magic or Skills. Aura is prominently used to perform Arts like Battlewill to create powerful physical attacks and effects that resemble magic.

By observing the potency of a creature's aura, their strength or danger level can be inferred to an extent. Many security systems within human settlements are built to react to specific auras, usually ones associated with monsters. This suggests there are certain qualities not all auras share and can be attributed to certain groups of creatures or individuals.

Types of Aura

 * Mystic Ki (妖気) or Mystical Aura: Produced by Monsters and all Magical races.
 * Fighting Ki (闘気) or Fighting Spirit: Produced by Humans and Demi-Humans.
 * Dragon Ki (竜気) or Draconic Aura: Produced by True Dragon and Dragon races.
 * Holy Ki (聖気) or Holy Aura: Produced by Holy beings.
 * Spirit Ki (霊気) or Spirit Aura: Produced by pure Elementals.
 * Divine Ki (神気) or Divine Aura: Produced by Divine beings.