Kamiyo'nanayo

This dōjutsu, Kamiyo'nanayo, is the unique Mangekyō Sharingan of Hikari Uchiha. It is the technique which involves Hikari's 'intangible' ability.

Left Eye
On the left eye of Hikari, it grants the ability to make himself intangible, or somewhat in the similar manner of an untouchable spirit, making him rendered untouchable and therefore he cannot be attacked by many means. His body will seem to flow away once something go through him, and the ghostly body will seemingly separate from him and revert back to his original form like a ghost.

Another effective use of this ability is that anything Hikari touches can also be in a ghostly state, provided he has prepared it to be in the ghostly state by using the left eye on the object. Simply touching the object, be it in the ghostly state or before in the state and activating the ability, will not work.

Right Eye
The right eye grants Hikari the ability to break/split/cut/bisect the enemy's soul into two parts. One of the parts will disappear from the enemy's body, thus losing a part of the soul, rendering that part of the body useless. Of course, if the part involve a fatal spot, it would most certainly kill the enemy. This ability is the reason for the alternative name of this dōjutsu, Broken Spirit.

Drawbacks
Intangibility and breaking one's soul are incredible abilities, but they do have drawbacks that makes this Mangekyō Sharingan not the most perfect dōjutsu. One major risk of this dōjutsu is that both abilities cannot be used at the same time.

By using the 'intangility' ability risk the user's inability to attack, because his entire body would be in a ghostly form. Therefore, if the enemy cannot interact physically with the user, the same goes for the user. Also, anything that has been in the state of the spirit, once the ability is deactivated for the user, any object will automatically be reverted to the original state, though this can be a method for trapping enemies.

Using the 'soul-breaker' ability risk the user's focus for any other enemy to attack. Once exposed, the user should be quick enough to carry out the technique and finish it quickly before exposing their vulnerability to the enemy. One must have complete focus on using this ability. It takes a few seconds to successfully 'break' the soul, and the few seconds can be enough for others to attack.

Other than the risks above, using this Mangekyō Sharingan, like any other, puts a great strain on the user's eyes. However, it seems to Hikari that no eyesight is lost.