In my admittedly thin writing experience, I’ve found that creating characters is akin to hitting a constantly changing moving target. I never really take notes about the story. I just tend to dive in and let things evolve.
I like thinking about the main characters. My first view of them is almost always not what they end up as. I’d originally thought that Fern, in ‘Best Intentions’ would be a larger than life character. I first thought of her as the Amazon of the two sisters, but as I started writing, I realized that I’d reversed the view. Fern was actually the short redhead, her sister was the Amazon Princess.
The change worked great, but I had no real clue that the shift of perspective would happen until I started writing.