Tone is somewhat totalising in that, once I locate it, it tells me what kind of syntax to use, what word choices to make, how much white space to leave on the page, what sentence length, what the rhythmic patterning will be. If I can't find the tone, I sometimes try narrating through the point of view of someone else.
I was really inspired by these larger-than-life female artists like Lee Bontecou and Eva Hesse and Yvonne Rainier and the incredible Lynda Benglis. There were many women who were really driven and became successful, who were part of essential paradigm shifts, despite the fact that the art world was still dominated by men.
I think character is very much a product of where you live, who you are, what is happening in that time of your life, and I'm interested in those pressures, those forces. A political context, a social context, really determines if not who people are then how they treat one another and what they say, how they speak.
I think sometimes writers can get themselves into trouble trying to exert a totally controlled and super-knowing tone. This kind of knowingness is not the most promising tone to be sustained throughout a novel, to have a young woman who understands everybody and is always reading a room perfectly.