Mizuki has light cyan hair which is parted to the left, part of which she keeps in a ponytail, and lavender-purple eyes. She wears a white neck scarf patterned with the same cyan hue, a white dress shirt, a gray suit coat which she keeps unbuttoned, and gray slacks. She likes lattes, spy films and paranormal investigations and dislikes problems without solutions and adults without common sense. Tsujimura appears as a kind and genuine woman, although slightly gullible.