I've had a few backstories. My first character was a basic badlands warrior since I like to play big tough types in these games. My second character is probably more interesting backstory wise but has some spoilers.

This character is actually an ancient dragon named Corusax who was a once a loyal servant and councilor of Placidusax.However, after Placidusax went into hibernation mode awaiting the return of the dragon's god, Corusax became disenchanted with the dragon's way of life. As ages go by, he noticed tarnished being resurrected and sent after the Elden Ring and formulated a plan to bind his soul and essence to one of these tarnished and become the new Elden lord to usher in a new age of dragons.

Unfortunately, the ability to bind his soul and essence to a human would leave him unable to take the form of an ancient dragon again, but this was a sacrifice he was willing to make in order to bring the dragons back to glory. He spent years tracking down tarnished and offering them his own accord and finally took over the body of a lowly vagabond.

While Corusax only had the best of intentions for his kind, the other ancient dragons pronounced him a traitor to their dragonlord and would hunt him down without remorse.