Ninja Art

Are supernatural abilities that Taimanin are able to use, some of them are unique to their clan. They use "Taima Particles" and are highly effective against demons.

Arts fall in some categories of typical elements like "Fire, Water, Wind, Earth, Wood", while others are hard to classify.

Inheritability
A Taimanin can only awaken to abilities that have appeared in their own lineage. Meaning a family with only Fire Users will never awaken to a Water User. However, if a water and a fire user have a child, it or its children, could one day awaken to either a water or fire art.

Some Ninja Arts awaken very rarely and it takes generations for them to emerge in only a single individual. Even shared main element arts tend to have specific versions, which are still rare.

A "Half-Demon" will typically first learn the "Magic" of their demonic side but can also awaken to Ninja Art which can be completely different. (Example: Onisaki Kirara)

People like Fulst, have shown the ability to transplant Ninja Arts from corpses. (Example: Oboro and Sawaki Kosuke)

The UFS also constantly tries to do experimentation infusing demonic cells but the results tend to be far from stable, with people more often than not just becoming demons. The Chinese Union tried to clone Taimanin but discovered that clones do not inherit the Taimanin ability and have so far not awoken to a single one. Though some gain similar abilities with external help of cyborg enhancements.

Learning and Mastery
A Taimanin is not born with an awoken ability, infact a large number of Taimanin never awaken to it. Mastering only the skill to use Taima Particles to buff their bodies.

Mental Stress can help in awakening an art but the process is not fully understood and highly individualistic. Some Taimanin despair about the fact they have not awoken but stay motivated by the stories of late bloomers that in their later adulthood awoke to their arts.

Once awoken typically a Taimanin chose fitting weapons to benefit their ability and train it next to other skills in Gosha Academy. Those with arts that are very hard to control and dangerous, require Limiters.

Though not many some reach a level of mastery in their prefered art, which enables them to use their skills in many creative ways far beyond what they could do originally.

Effects
Taimanin, Ninja Arts are not "magic", as it is understood by Demons. Based of statments of Edwin Black, the Taimanin Arts and particles infact disrupt demonic powers like magic. The fire cast by an art will be far more destructive to demonic cells.

How an art is created by Taima Particles is not 100% understood but possibly is connected to other dimensions.

Trivia

 * Why clones don't show the same abilities is not known and it is possible that a Ninja Art is connected to the person's individual soul and are not just genetics.
 * As Koukawa Oboro's body Oboro did not share her originals power, this might also be connected to the soul being important.