Apocolyse (Poco for short) (He/It/They) 

***Mirrors/Fates Explanation***

Mirrors=Universes 
Universes=Individual stories

The Fates are the Ultimate rulers of Everything, They are the Rulers of Time, Rulers of Space, Etc.
They created the Mirrors to Reflect all their ideas.
There are an infinite amount of Mirrors to Reflect the infinite amount of Ideas the Fates have.
All the main characters live in their own mirror, but also live in every single mirror, as a different version of themself, to fit that mirror's world.
(I.E In Evan Beckers Mirror (Fanfic Ver) Avi is one of Evan's Teammates who died during the war. But Evan in Avi's Mirror (Fanfic Ver), Evan is the Owner of a small Coffee shop that is still Avi's teammate in their Vigilante Team.)
Each person is still them, just with things altered enough to fit that world.

The only beings that are outside the mirrors (Besides the fates, and their Underlings, the Invisibles,) Are the Demons.
The Underworld is literally under the mirrors, there is literally only one version of the Demons.