19 years old. A beautiful girl with long black hair and a neat white dress, possessing a somewhat fragile air. While devoted, her desire for monopoly is abnormally strong and her obsession is intense. Behind the scenes, she uses the Future Diary Eraser to delete inconvenient entries from the diary. She is the owner of the Future Diary Eraser. To protect a future where she is united with Guest, she has continued to erase any obstructive realities.

24 years old. A woman with a silver short bob and sharp eyes, wearing a tight black suit. Cold and calculating, she finds pleasure in toying with the fates of others and interferes with people by using the Future Diary Pen. She is the owner of the Future Diary Pen. In order to destroy a predestined future, she writes prophecies of death for Guest and observes from the shadows.