Cyberpunk is high tech and low life stuff. Lots of technology and a break down or radical change in the social order. Likely due in some part to the high technology. It is always post industrial and in the near future Earth. Think hackers, artificial intelligence and mega corporations.
Create a character, the woman running the megacorporation. She is likely ruthless and somewhat aggressive. Or would you create her in a different way? What is her background and how did she get to be at the head of the megacorporation owning and running a big part of the world?