Finnia

Finnia was a human, and was no different from any other human aside from one little fact. She couldn't believe in any god. It did not matter how devoted she was, her prayers would never reach the gods, her sadness never tugging the heartstrings of the divine. In fact, us gods could hardly observe her even if we tried to do so with purpose. That was why she was taken to be faithless, with nations and churches torment her as she wandered aimlessly for her whole life, ultimately dying in isolation and despair.

And since she wasn't taken in by any god, evil gods couldn't find her either. Not to mention that the Prince of Darkness was still playing mud at who knows which hellhole. Either way, death was not the end of her despair, tormented eternally and caught in perpetual isolation without any chance of peace, her mind was lost to madness.

Her mad spirit hence drew other despairing souls to herself, eventually becoming a crucible of hopelessness and suffering that mutated frighteningly. It was too late when us gods finally noticed. She had been corrupted utterly, reborn as a new evil god of despair. Divine Injustice, Pain Eternal.

Aslan found here and striped here of her divinity. She herself should be reborn as a human, so that she can die as a human.