Chapter 1:
Mister Torgue High-Five Flexington was a very unusual kid. As one of the two survivors of the Fuyuki City Fire (the other being Shirou Emiya), Mister Torgue was an orphan and a ward of the state. He lived alone by himself in a one room but slightly big apartment, and he had a part-time job as a janitor in the local chemical plant, handling highly volatile and explosive chemicals. It helped that he was very knowledgeable about them and he looked old, and also pulled the orphan card to get the job.
At Fuyuki City Highschool, Mister Torgue was known around locally for two things: his very strange looks, what with facial hair and pectoral muscles and large frame and weird hair style, and his love for explosions. Mister Torgue was not the the brightest student around (nor the sanest), but he certainly was the loudest, flashiest and insanely obsessed with explosives. Almost any chemical experiment he was involved in would result in explosions, even when all the instructions were followed to the letter and with a teacher supervising him. He was also very good at English, and one Fujimura-sensei would find herself baffled how a person managed to write a very passionate poem about explosions.
What Fujimura-sensei (or Taiga as she was known to another of her student), was that Mister Torgue was a very valuable 'consultant' with the Fujimura Yakuza group. Of course, the group also didn't know he was a student, because he didn't look like a student, or at least looked a 'Yankee'. What he did for them was anything possible with explosives. Some cleverly planted explosives on Fujimura territory by a rival group? No problem, Mister Torgue was there to disarm them, and then he'd take them with him, while a couple of days later there would be news of unknown fireworks. The Fujimura group needed to act as middlemen for some explosives trade? No problem, Mister Torgue could be counted on to check quality, and explode the bad ones (although to him there were no 'bad ones', there was simply explosions, and more explosions).
As time went on, Mister Torgue grew richer from his ventures into the explosive world of handling explosives for the Yakuza, he grew a mustache, he had abs, he got promoted in his semi-legit job, and his grades maintained themselves, except his chemistry class had a new rule: do not let Mister Torgue do ANY chemical experiments. Physics and biology experiments were still somewhat acceptable.
What other people didn't know was that, by some strange, twisted strand of luck, Mister Torgue had somehow managed to learn the arts of magic, becoming a magic user. Of course, he also didn't know jack about the Clock Tower or Mage's Association, or that there were other magi in the land. All he knew, was that his desire for explosions was so strong, so passionate, that he one day he felt some pain (it's a great pain, but this is Mister Torgue, a very manly man), and then he could have explosions at will while feeling some sort of 'tiredness'. Of course, this some pain later resulted in him getting some burns and broken body parts since he was in his workshop tinkering with explosives stuff. Luckily for him, all evidence of these illegal experiments was erased even as the neighbors called for the emergency services to put out the fires and rescue the trapped orphan. Coincidentally, there was some scare of terrorist bombings when there was sudden increase of explosions in the hospital, albeit not so big ones.
In the time since then, Mister Torgue had only grown bigger, taller, tougher, hairer. And his expertise with explosions was to the point that somehow he managed to build a working bolter straight out of his favorite table-RPG game, Warhammer 40K (and he always played Space Marines, and always used bolters). It was so impressive that Fujimura Raiga even asked Mister Torgue to build him one. Suffice to say, Taiga certainly had a shock when she found her grandfather gleefully blasting car wrecks to pieces.
Time went on like this. Shirou fixed things and earned the moniker of the Fake Janitor, Tohsaka Rin carried on with her fake school idol persona, Issei continued disliking her a lot while hanging out with Shirou, Shinji continued to torment Sakura, Sakura continued developing a crush on Shirou with the occasional yandere tendencies. But it was all about to change, as the Holy Grail War was soon to start. And things will never be the same, with Mister Torgue participating in it….
AN: Well, this was something I had thought of very recently: a 40K, FSN and BDL2 Xover. And since I love Torgue weapons…well, suffice to say it should be interesting. R&R too, and if u spot any Natsu canon errors, let me know and I'll deliberate whether to fix it or not.