It's honestly hard not to think you are kidding when half of the things you said about this "dynamic" are made up. I always laugh at your posts (not in an offensive way) lol thinking two match well together with no proofs but your mental headcanons is called having a (more than) crack ship. Nothing wrong in that, but it's only fan assumptions or better yours. Gray and Mira don't even talk together and when they will end up with Juvia and Laxus you will receive a big delusion :/
Well, I do acknowledge that it is a crack ship. And actually, most of my favorite ships are indeed crack ships. I dislike 90% of the "semi-canon" ships in this series.
If I were to be honest, one thing that separates me apart from the majority of FT shippers is the fact that "proof" doesn't matter. I understand that there is this "ship war" in the Fairy Tail fanbase over which ships have more proof, which are canon vs. non-canon, and which are more likely to happen.
I happen not to care about any of those.
Headcanons, fan assumptions, delusions, and manga proof are none of my concern. I pretty much just look at all the characters and decide which one looks good, according to their personalities and dynamic.
I'm already fully prepared for the main ships to get together. I'm also fully aware to see Acnologia get defeated in an absurd way.
But I still think GrayMi is the best couple in FT.
And while it's true that Gray and Mira don't have the greatest amount of interaction, each of their encounters and conversations are always of the highest quality.
Early in the series, there were many hints such as Mira always teasing Gray and fake crying only in front of him.
Gray has also shown to specifically call Mira, "Mira-chan", which is a suffix added to a person's name in Japan when a female is considered special or valuable to the male.
And Mashima has also made a "romantic relationship scandal" chapter cover featuring Gray and Mira along with a few sketches of those two together in the past.