Hrímfaxi

Hrímfaxi (月輪神馬 (フリムファクシ) ) is used for transportation.

Etymology
Hrímfaxi is the horse of, the personification of night in Norse Mythology.

Principles
In the world of Toaru Majutsu no Index not much is known about it. It is not clearly specified as a spiritual item or a beast, though it is powerful enough to allow Marian Slingeneyer to traverse from Japan to Denmark quickly.