Natsu and Gray Parallel?
Remember when Natsu saved Gray? (on more than one occasion)
“I didn’t want you to die. Didn’t my voice reach you?”
(In the top panels, pretend the roles are switched, Natsu is saying what Gray is saying and Natsu is saying what Gray is. They’re vice versa. Where Gray is saying “Lyon”, pretend it were Natsu saying “Zeref” and it’d look like the situation they’re in now.) It’d seem pretty ironic but I can see it happening.
I think we’re going to see a very similar moment soon.
Gray knows that Natsu is END and he is now seeing it with his own eyes. Gray will try to save Natsu, much like Natsu did for him many times. But regardless, they will have to fight soon, it’s inevitable.