16Core Character Mapper is a dedicated tool for storytellers to visualize cast dynamics. Unlike generic notes, it maps characters using a research-backed system of 16 traits to ensure consistency, spot cloned personalities, and engineer narrative tension through psychological contrast. The visual grid provides a bird’s-eye view of your cast’s makeup to help you identify character blind spots. It is cross-platform, 100% free, requires no signup, and works entirely offline to protect your privacy.