User blog comment:Crazylittlefreakgirl/Fairy Tail Official Pairings?/@comment-72.66.31.250-20120517004615

The short answer is no, Mashima has not already declared the official pairings of Fairy Tail.

The long answer is that:

1. While he's certainly made himself and his notes relatively available to the anime crew, and has a good working relationship with the director, and does character design for pretty much everything Fairy Tail related, nothing has been said about him having a direct hand in steering the anime choice of additions.

2. Mashima never said he wrote the fillers himself, and indeed the filler episodes don't have his name attached to the writing credits. The only "filler" we know he wrote himself was the third OVA. The only reason that any of the rest can be said to be canon is the stuff that came from his notes like Oracion Seis's origins. Indeed, the reason it's so notable that chapter 282 referenced the current anime filler arc is that that previously people were considering it non-canon. Bottom line is that while they anime staff gets plenty of support form Mashima, he doesn't write the fillers himself.

3. As stated above, non of the fillers were written by Mashima. Furthermore the anime director didn't tell Mashima to bring Lisanna back, he stated he tried to make her death ambiguous in hopes that she'd turn up alive, and Mashima himself made the decision to bring her back. Nor has there ever been any word of Mashima "getting mad" at the director for anything. Even if they had a disagreement, we wouldn't have heard about it. The bottom line is that anyone saying that Mashima was upset about what the anime staff was doing with the pairings is wrong.