The Metalwood Saga / Reference Guide

Full-series spoilers

Imprisoner

"The Imprisoner" is the wrathful title the Twins use to describe the ancient individual who locked their souls within the ethereal dimension of Ambarhal. Unbeknownst to most, the Imprisoner is actually the scientist Orym (formerly known as Aten or Akhenaten), who sealed the Twins away one hundred thousand years ago to claim the power of the Xyclami device for himself.