Enoch

Enoch (エノク) is a mysterious term that is used by Index during her first meeting with Himegami Aisa regarding her validity as a magician. It is included in the likes of Kabbalah, Hermeticism, Vision of Mercury, and Modern Astrology. It can be assumed that Index is referring to Enoch as a school of thought or belief like Kabbalah.

Etymology
is a name in the Bible used to refer to two characters, first being the son of, and the other, the ancestor of.

Background
Enochian elements were among the various components which were incorporated into the Golden Dawn's magical system. One of the cabal's founders, Samuel Liddell MacGregor Mathers, played.