Spirit Eye

Information
This Doujutsu is unobtainable by any birth mean or possibly even replication, for the eye came about as a mistake during a traumatic event occurring in the life of Kōyō, who had been experimented on right before the tragic occurrence. The Doujutsu can see everything that has anything to do with a person's health. The user's eye will turn a brilliant golden color, glowing even as the pupils grow significantly and form an eclipse of sorts in the irises, yet the user can "see" nothing but the pulse of people's heartbeats. The pulses let off a vibration of white, visible energy that can be used to detect disturbances within the body.

There are several things which the pulses can indicate, such as a disease, foreign substance, object, or anything that could possibly throw the body out of homeostasis. This is what Kōyō uses to first find where the affliction is located. Once the source is found, she can "zoom in" on the area in question, which will cause her pupils to shrink, contrary to their first appearance. Zooming in allows Reimei to view the internal structure of the body, and the place of injury, even if it is within organs or bones. The substance or affliction can be identified in that manner and in mere moments.

Although it can do nothing to actually heal someone, this knowledge can come in handy if one were a Medical-nin; however, Kōyō is not one, so attempts to help in any way she can.

This Doujutsu is believed to be a mutation of the Hyuuga clan's Kekkei Genkai due to the abilities it shows.