The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Administration (2 members)
- Animals (13 members)
- Anime (31 members)
- Anime images (1,725 members)
- Antagonists (17 members)
- Article management templates (2 members)
- Article stubs (278 members)
- Blog posts (1 member)
- Building 1 (4 members)
- Building 10 (2 members)
- Building 11 (3 members)
- Building 12 (2 members)
- Building 13 (11 members)
- Building 2 (6 members)
- Building 3 (6 members)
- Building 4 (8 members)
- Building 5 (12 members)
- Building 6 (7 members)
- Building 7 (4 members)
- Building 8 (4 members)
- Building 9 (2 members)
- Candidates for deletion (6 members)
- Cell 11 (1 member)
- Cell 13 (4 members)
- Cell 6 (2 members)
- Cell 8 (3 members)
- Chapters (75 members)
- Character Album (2 members)
- Character Song (11 members)
- Characters (149 members)
- Characters by location (18 members)
- Deceased (8 members)
- Disambiguations (0 members)
- Ending Theme (2 members)
- Episodes (27 members)
- Female Characters (26 members)
- Fragment (2 members)
- Gallery (120 members)
- Gay (1 member)
- General wiki templates (1 member)
- Guards (30 members)
- Hidden categories (1 member)
- Images (5 members)
- Inmates (32 members)
- Main Protagonist (5 members)
- Male Characters (96 members)
- Manga (82 members)
- Manga images (1,398 members)
- Manual of Style (6 members)
- Media (3 members)