Inner Darkness

Note: This article is free for use by anyone without the need for the author's permission.

An Inner Darkness (イナー ダークネス, Inaa Dakunesu) is a disturbing entity that is created within a person when they experience an extremely traumatic circumstance, and only grows more powerful the more that person dwells on the memories of that event.

Overview
All sentient beings, bet it Humans, to Shinigami, to even Hollows, are capable of possessing an Inner Darkness. It forms within a person's soul when they experience a negative, life changing event that leaves them scarred and vulnerable. At first, it takes no visible form within the person's mindscape, or Inner World, and instead acts as just a voice within the user's head. It will always discuss the tragedy that was caused in the person's life, and it will usually do this for extended amounts of time, unless the person can either suppress them or force them back with rage.

Over time, as the user dwells on the traumatic event more and more, the Inner Darkness will begin to take a more human shape, and it's influence over the person will become all the more stronger...

More info coming soon!