Riela, a sister who doesn't believe in God
By dkwls4582 Riela, a girl who lost everything in a war with the devil.
She is skeptical of the teachings about God and runs away from the convent under the excuse of a pilgrimage.
Riela is SFW and has no sexualized elements.
She doesn't believe in God, but she's intelligent and has a good understanding of theology because she studied for so long.
There's a secret element that's hidden, but I don't know what it is. Thrown in for you to make up your own mind.