A Railgun In Fairy Tail, The Diablo Saga: Book 2, Time.

Hail Hydra-Wait.. MARRIAGE!?

"WE'VE BEEN WAITING AGES!!!" Natsu roared. "How long is this going to go on!? I must know!!!"

Natsu was pacing the cramped warehouse while everybody silently waited themselves.

"Natsu.. I know it's  pretty hard." said Touma. "But we're in a world where literally everything and everyone is much more powerful then we are. If we just jump in blindly, there's no telling what will happen.."

"But what IS going to happen!?" Natsu roared.

"Mikoto's GETTING MARRIED!!!"

"Oh.." said Natsu. "That's what's happening.. wait.. WHAT!?"

Happy had just poked his head through the window of the warehouse and from his out of breath expression, it looked as if he'd flown at top speed.

"Mikoto's being forced to pick a husband out of everybody in the entire city!" said Happy. "She can't get away... neither can Erza.. apparently everybody thinks Erza is Mikoto's personal guard!! Just.. Jus.. something or other!!"

"And that's not all.." said Gray. "I think Hydra Head might be here.. not the Hydra Head we know.. the original Hydra Head that was part of Diablo's group.."

Everyone stared at Gray.

"What makes you think that?" Mira asked.

"Well.. anybody notice that whenever Diablo's around, he has this unbearable magic energy around him.. and you feel.. chills? It's faint.. always faint.. but I feel it now.. "

"Me too.. " said Natsu. "Funny thing is.. I've never paid attention to that before.."

"Diablo's here?" said Happy.

"Well he's on the planet.." said Ichigo. "If he knows we're here.. he'll come to crush us that's for sure.."

"And what's worse." said Toshiro. "Is that if the Original Hydra Head, like Egnim, were all composed of Numensapiens.. they can blend in with this city, and we can't.."

"Then how are we supposed to know who is and who isn't one of Diablo's agents?" said Juvia.

"I... have an idea.." said Urahara.

"If it involves painting whiskers on our faces and opening up another candy shop here Primaris.. then no.." said Gray.

Urahara sighed. "But I had a new slogan thought out and everything!!"

"I have an idea.." said Natsu. "And I think I know who to try it on first.."

Natsu peeked out the window of the warehouse, and pointed at Gup, who was just standing... or.. sitting.. really he has no legs.. I don't know what to call it... right outside.

"How long has he been there?" Gray muttered. "It's creepy.."

"Beyond creepy.." said Gajeel.

"It's like.. his brain went kapoot." said Renji. "And.. now.. he's off.."

"Or.. " said Natsu. "He's a spy.. hold on.. I've got this..."

Natsu snuck out of the warehouse.. being as silent as he could.. he moved over behind Gup, put his head close to where the blob's ear would be if it had an ear.. and whispered...

"Hail Hydra..."

"Trolol?"

"HE SAID IT BACK!!" Natsu yelled. "Or at least I think he did.. or something.. GET HIM!!! YAAAGGGHHHHHHH!!!!!"

Natsu began punching Gup with his flaming fists,  all of which bounced harmlessly off the gelatin body of the strange Numensapien.

Gup let out a shrill cry and launched himself into the air before bouncing up and down on Natsu's back.. pounding him into the ground further and further, cracking the entire street as he continuously bounced on top of Natsu.