Aura

Aura (オーラ) is a particular force released by most living beings, usually leaking from their bodies in varying amounts.

Properties
Aura is a form of spiritual matter that exerts physical effects on the world. Most living beings release aura from their bodies without doing anything special. In combat, aura is released from the body as Fighting Spirit, and is most commonly used to enhance one's physical abilities, such as power, speed, and durability, with varying results depending on the quality and amount of aura within a person, in addition to their proficiency in controlling it. Likewise, Fighting Spirit can also be used to increase the performance of equipped gear beyond normal. In practice, this results in superhuman feats without the aid of Magic or Skills. Fighting Spirit is a fundamental component of Battlewill, a school of Arts that creates powerful physical attacks and effects that resemble magic. When Fighting Spirit is combined with magicules, techniques encompassing both physical and magical phenomenon are born, known as Mystic-Arts.

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

 * Fighting Ki (闘気) or Fighting Spirit: Released when fighting. Used by all living beings.
 * Mystic Ki (妖気) or Mystical Aura: Released by Monsters and all Magical races.
 * Dragon Ki (竜気) or Draconic Aura: Released by True Dragons and their Dragon offshoots.
 * Holy Ki (聖気) or Holy Aura: Released by Holy beings.
 * Spirit Ki (霊気) or Spirit Aura: Released by Elementals.
 * Divine Ki (神気) or Divine Aura: Released by Divine beings.