The character is very daring to come out of her house and step into thick fog. The character is unaware what is outdoors within the thick fog, this could be something dangerous but she is very confident to step outside of her safe home into a dangerous place. This symbolises that the character is very daring to step into danger.
Hope this makes sense :)
But words is like the spots on dice: no matter how you fumbles 'em there's times when they just won't come. So simile is the answer.
Attach an image. We can’t see the actual text therefore cannot answer you question.
