User blog comment:PUNCHURPREGNANT/Gray and Silver Predictions/@comment-4829046-20131113085714

This kind of speculation has been running about for a while now so its nothing new.

Here are a few problems with that theory

1. Apparently all the 9 Demon Gates are from the Book of Zeref. There are also demons that are NOT from the book of Zeref but we are unsure about the difference due to lack of info. It was new for us to learn that the Demonification process required that specialized tank fueled by their magic and there will probably be more such revelations.

2. We know very little about how all the Demons in FT-verse work. Whether they are different due to Zeref's magic or whether there were multiple races originally or what-not. There are sentient Demons, Bestial Demons, Demons that are mostly human except for their special appearances and attributes and Demons that can transform into Large Monsters. Also there are Demons that can be made out of inanimate matter.

3. Gray learned Ice-make from Ul. That has NOTHING to do with family heirloom or anything. Even if he is Gray's father, his reason for apparently having ice magic as well should be explained more.

4. Nobody cares about Gray. ( ._.)