User blog comment:Add799/Nine demon gates a type of celestial spirit magic?/@comment-5303512-20131028181713/@comment-7418318-20131028234229

So far Zeref showed no interestin in Lucy at all. Also Lucy and Natsu aren't quite as central to the fate of the world as Elie and Haru.

If Zeref shows any interest in Lucy in the future I seriously hope it is related to her powers or keys and strictly none-romantic.