Talk:Sankishin/@comment-69.1.100.64-20140303193908/@comment-16571503-20140303211938

When you're asking about the original, do you mean the zeroth or the first unit?

What happened to the zeroth isn't known other then that it grew a soul.

The first was in the beginning dumped into the boundary and was later destroyed by humanity using Izayoi. There is a possibility that Saya is the first since: 1) The first was destroyed, Destroyed isn't the same as killed. 2) the cover art for BBCP:MC has "M(URA)KUMO (NO) 01 (SA)YA" on the black coffin. 3) Rachel called Saya's body 魔素の結晶(masou no kesshou, Crystal of Seithr) which is the same as the Prime Fields are (artificial beings created from seithr)

What's know about Amaterasu Unit is that it's located in the boundary, it's also called the Master Unit, and the world is created from the dreams of a girl inside the unit.