Fullmetal Alchemist

That's right. I only discovered it very recently... I've noticed that I've always been different from all the other humans. Among my peers, I'm a bit of an outcast. And not even just an ordinary nerd... I never quite understood why, but I was just different. Naturally. It was in my intelligence, my behavior... now, I finally know why I was so different from all Du other humans. Because I'm not human. I'm a homunculus. My real name is Stubbornness. Stubbornness the Obstinate.
I don't know how when it happened - probably at a very early age, because I don't even remember ever becoming a homunculus....