Companionship is a spirit relationship. It refers to the relationship between a Giant spirit that watches over and tends to a smaller but magically potent spirit. It dampens the negative effects excess energy can have on the smaller entity, with the Giant taking in excess and storing it like a battery. The relationship is noted for creating a scar and marking on the Giant half of the Companionship.
The most notable example of Companionship is that of the Laetha Ava and the spirit Erann.