Apophis Roa

Apophis Roa (エーポフィスロア, Ēpofisu Roa) is a Dark Mage known infamously for her pursuits of the dark arts of Magic, otherwise known as simply the Black Arts, though she does possess knowledge of other forbidden forms of Black Magic. Apophis' pursuits and research delving into these forbidden magics, including gaining a book that mostly documents said Magic, granted her the title of Witch of the Black Gospel (魔女の黒ゴスペル, Majo no Kuro Gosuperu).

Her power and notorious reputation has made her one of the Magic Council's foremost targets, being pursued and hunted by even the likes of the Holy Knights, as well as bounty hunters and other Mages, among others. Not much else is known about Apophis' past or actual end goal, due to living in isolation in a forest that is under a maze-like spell, keeping her true location hidden.

Trivia

 * Apophis' appearance is based off of Tharja from Fire Emblem: Awakening.
 * Apophis, or Apep, is the name of the Egyptian embodiment of chaos.