Thanks for the feedback guys, glad to see there's bits you're finding interesting
I'm starting to go in a direction I'm happy with in some of these, but there's nothing that really excites me yet. I find writing stuff down and coming up with concepts beyond the character really useful, so I spent a few minutes doing that:
World: Earth has been reforested with bio-engineered trees that convert polluted air into a precious mineral. Humanity has been gone for 100 years, only a few small impoverished communities left behind. Now humanity is returning to harvest the forests and resettle the land.
Hero: She was a little girl when the hulking great metal cubes left the earth. Over the years she has augmented herself with left-behind technology, often weaving it together with elements from nature.