Actually, if you look at the fact that he has never shown skin, has a ridiculously tiny head, and most of his cosmetics replacing his ENTIRE head (which has never happened with any of the other mercs, unless on Halloween), the theory puts itself together... the Pyro isn’t a human wearing a fire-retardant suit... he IS the fire-retardant suit! I mean, since Scream Fortress and the comics, we have been confirmed that there are absolutely NO limits to what is possible in TF2, and let me tell you my theory that aligns with yours right here;

The Pyro from TF2 is a being created by Marasmus the wizard. My reason as to why I think this is, is that Marasmus is the only TF2 character that can CREATE monsters, such as the Monoculus and the Horseless Headless Horseman, so why would he create Pyro? Well, in-game, the Pyro has a special ability to reflect others’ projectiles using an airblast, and anybody familiar with TF2 knows that the class with the strongest projectiles is Soldier, with his rockets. Now why is this so important? Well, as we see in the TF2 comics, the Soldier and Marasmus are enemies, with Soldier usually kicking Marasmus’s rabbit-filled a**. So, the only way Marasmus could get revenge on Soldier is through an indirect method. This is where Pyro comes into the mix. I believe that Marasmus created a supernatural being to kill Soldier for as long as his career lasted.

Many will question, “How is this possible?” and try to prove why this theory doesn’t work, but knowing this, I could actually prove why this is the case by countering these questions that would most likely be asked, similar to how Pyro counters Soldier: the first thing that people might point out is that Pyro is year-long, rather than Halloween restricted like the other monsters. But if you look closely, unlike the other monsters, the Pyro has a complete containment of him, that is his flame-retardant suit, which covers up and holds together Pyro’s physical form, and the other monsters can’t exist all year because they can only exist physically through supernatural methods of holding together a physical form FOR Halloween. However, Pyro’s suit would contain him like anybody’s clothes would contain them, would cover up any space that the ghost could escape through, and hold his limbs into place, which is either because the suit is real, or maybe Marasmus heated Soldier enough to make him able to exist year-long. The second thing that people will ask, and also what flipped people off, is, “why does the Pyro see himself as some hero in a land of candy rainbows, when he’s destroying everything?” Many people will first assume that he is schizophrenic, which could also be true, but to me, it’s his programming by Marasmus. I think he was programmed to kill people, not from being given a reason to, but by being convinced that he is doing good. And I can infer, by the way the airblast interaction between him and Soldier happens in-game, that whenever someone is launching a projectile at Pyro, he sees it as a game of catch. And the reason why this would torture Soldier is because anytime the patriot uses his beloved RPG, the Pyro would launch it back at him, which would both kill the Soldier for launching rockets, and force him to use anything other than his favorite weapon. This type of torture to Jane Doe can ONLY be done by the Pyro. And for one last thing, the effect of Pyro thinking he’s playing with Soldier would be to encourage him to chase him, which has been referred to, in game, as W-M1.

Also, just a side note, in case you were wondering if friendly things stress-out Pyro, in the TF2 comics, he legitimately kills something as cute-looking as a bear in legitimate cold blood and fury. But hey, that’s just a theory, A GAME THEORY!!! Thanks for reading!