What is Innocence?

What is Innocence?
Innocence isn’t what you are thinking off, where it’s a person who is oblivious to anything.
People on here who have watched D.Gray-Man and read most of the Manga. You will know what we mean by innocence.
If you are new to the DGM world. This is to help you out on what the concept of innocence is.

Innocence is a substance of unknown composition known by the ancient civilization that first cultivated it as the "Crystal of God". It can bond with certain humans, known as Accommodators, to form an "Anti-Akuma Weapon", the only kind of weapon on earth that can purify Akuma, saving the souls that are bound to them from being destroyed by the Dark Matter that gives them their power.
Innocence, being the polar opposite of Dark Matter, the Earl of Millennium's chosen weapon that gives him, the Noah Family and his Akuma their powers, is also the only substance that can damage the Noah and their Memory. Conversely, this means that the Noah have the power to destroy Innocence.

Innocence is, to a level, sentient, capable of recognizing those who are and who are not Accommodators, and capable of punishing Exorcists who turn their back on God, as it was seen with the case of Suman Dark, who became a Fallen One after betraying the Black Order and the will of the Innocence. Innocence can also be rather single-minded when it comes to destroying an Akuma, Allen Walker's parasitic type Innocence taking over his body several times (twice against his conscious will and once while he was unconscious]) to try to defeat what it recognized as "threats".

Approximately seven thousand years ago, an ancient civilization used the Innocence to defeat the Noah Family battle, with the wielder of the Heart of the Innocence killing the Earl of Millennium's first incarnation. The battle, though, was so great, that the earth was destroyed in what the ancient civilization called the "Three Days of Darkness", or the Biblical "Great Flood" from the Old Testament.
The ancient civilization, prophesizing the return of the Earl and the Noah, left behind the Innocence for future generations to find, leaving instructions in one particular piece of Innocence, the Cube wielded by Hevlaska, which began:


After the Earl returned, as the prophecy within the Cube said he would, the New World Alliance established the Black Order, charging it with finding the 109 shards of Innocence, the Accommodators who were to wield it, and to prepare for the battle that would come once again.