Izanagi

is the principal of Takamagahara. He resides at the highest point on Takamagahara.

Takamagahara Academy Arc
Izanagi is mention by Kikuchi when he tells Yamato that there is only one principle at takamagahara and that he resides at the highest point.

Abilities
It is currently unknown on what Izanagi is capable of but since he is the principal of Takamagahara, it can be assummed that has awoken his Divine Gift and that he is powerful.

Trivia

 * Izanagi is named after a Shinto Deity.