The story line of a character who is religious and has their beliefs challenged in the face of great horror and difficulty has been done to death and is now trite and cliche. And with "God girl" they don't even have that, rather, they have her whole and complete in her faith. She projects surety in her beliefs even though the world is crawling with death and destruction which basically makes her an annoying, Pollyanna moralizer. There's no depth to be mined there, there's just a cardboard character who doesn't have any range of conflict for their story. Yawn.
Maybe in later episodes they will do more with "God girl" in regard to challenging her faith, but to be honest I, and many viewers, aren't interested in that story line. We've seen it in countless other shows already. It's boring and trite and cliche. No one cares about a fictional crisis of faith because it's been done
ad nauseum already. The show is concentrating far too much on emotional melodrama and not enough on scifi action and storytelling. Lose the candles and replace them with carbines. Now
that's how you make an enjoyable scifi show.