List of Past Diary owners:
| Number | Name | Ability | |
| 1 | Amano Yukiteru | "Indiscriminate" Diary | |
| 2 | Gasai Yuno | "Yukiteru" Diary | |
| 3 | Hiyama Takao | "Murder" Diary | |
| 4 | Kurusu Keigo | "Investigation" Diary | |
| 5 | Houjou Reisuke | "Hyper Vision" Diary | |
| 6 |
"Thousand League Eyes" Diary |
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| 7 | Ikusaba Marco and Mikami Ai | "Exchange" Diaries | |
| 8 | Ueshita Kamado | "Server" Diary | |
| 9 | Uryuu Minene | "Escape" Diary | |
| 10 | Tsukishima Karyuudo | "Breeder's" Dairy | |
| 11 | John Bacchus | "Watcher" Diary | |
| 12 | Hirasaka Yomotsu | "Justice" Diary |