Who really is Pyro?

Who even is Pyro in TF2. It’s now been 17 years since Team fortress was released and what's crazy is it still has people playing it like there is still an active player base for this game and a character that always intrigued me from TF2 is Pyro. Pyro is a very unique playable character for a number of reasons. First, you never hear his voice. He wears a gas mask, so all you can hear are excited muffles, which is super goofy. Plus with his trailer we see that his psyche is a bit cooked. The dude moes people down like it’s nothing but in his mind they are just having fun together. Like This dude is probably more insane than the Joker. We don’t know much about him as a character but the little we do know can't even be trusted because Pyro doesn't just have visual hallucinations but also audio hallucinations so if you ask pyro a question he has no idea what you're even asking. But still there are many theories about who pyro is. Some say he is just a mentally ill guy or even a girl but some other theories are much darker. Some say Pyro is SCP 4557 aka 3 racoons in a suit. I personally like this idea.
#teamfortress2 #pyro