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.