One day, in a world where there are giant dragons in the sky and monsters in the sea, a strange creature is suddenly born.
Alien is a sidekick, and for some reason he was born with this in mind.
No powers, no talents. From an ordinary person's point of view, the only advantage that can be called is self-awareness? (Maybe the brain is easier to use)
I have to drag a body with no aura and no advantages. In this unfair world full of swords and magic, he may even die because of a joke from God.
"Hey, stop joking! Who allowed you to play with my life without permission!" The alien protested.
"Okay then." God replied with a smile, "But the setting has been made. As long as it remains unchanged, I will not interfere with your ideas and practices. How about this kind of deal?"
Just like that, God got his new toy. A "player" who doesn't follow God's will and can mess up the plot at any time.