Core

Biography
Core is the Knight of Two of a group called The Four Holy Knights. Core was tasked by Zero with the job of ruling a kingdom called Hell where Demise and all Dark Sages would be kept.

Once their tasks were done Core along with the others ascended to Utopia. Later on, Mason's cyborg Flame was a perfect sage for Core to be able to use and train him into the flames. It is unknown why he picked that sage but Flame became the new ruler of Hell, succeeding Core.

Book Appearance

 * Book 1