User blog comment:FairyRaven/Fairy Tail Chapter 416: Tartarus Arc: Final Part, Review and Commentary/@comment-25111584-20150119142640/@comment-9595671-20150119172236

I like the Natsu VS Gray thing now, I bet Mashima was even foreshadowing it when Natsu and Gray had that book fight.

Cause now Gray has two loyalties that conflict, the loyalty to Natsu, a good friend of his, and the loyalty to his father who asked him to kill END