I have a fairly robust character template that I keep regularly updated as I progress through my novels. Character aren’t static, and they do change over time, so I have a section in my template that covers character growth. I try to dig deeply into the psyche of my characters as well as their past and what influences them throughout the story. This helps me get inside their heads, so I can write believable, interesting, and dynamic characters. My goal is to go through the sections of this template in further detail in a different post, but for now, I’ll leave this template up for folks to peruse.
Here is the template for those that are interested in character design: