The Great Tree of Fenrir is the creature in the form of a large tree from which all Demon Larvae come. It is starving for Leafé and seeks to drain it out of all other life forms, similar to a parasite. It can be controlled by the Princess of Disaster. But only so long as she can focus on controlling it. Powers include large destructive vines, size growth, regeneration, and spawning demon larvae. The tree was eventually sated when the current Prétear, Himeno Awayuki turned into the legendary White Prétear and overfed it Leafé till it exploded.