The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Animal Design Department members (1 member)
- Anime Images (22 members)
- Article Stubs (0 members)
- Article management templates (1 member)
- Article stubs (36 members)
- Candidates for deletion (1 member)
- Chapter Images (14 members)
- Characters (11 members)
- Disambiguations (0 members)
- Documentation templates (1 member)
- Episodes (12 members)
- General Templates (1 member)
- General wiki templates (17 members)
- Heaven's Design Team Wiki (10 members)
- Image license templates (8 members)
- Images (5 members)
- Infobox templates (9 members)
- Main Page Templates (7 members)
- Maintenance (2 members)
- Male characters (1 member)
- Manga (40 members)
- Manga Images (5 members)
- Media (2 members)
- Navbox templates (1 member)
- Notice templates (9 members)
- Pages with broken file links (2 members)
- Pages with script errors (16 members)
- Pages with syntax highlighting errors (2 members)
- Quote templates (2 members)
- Stubs (0 members)
- Template documentation (45 members)
- Templates (15 members)
- Templates/Infobox (1 member)
- Templates/Navbox (1 member)
- Theme Images (5 members)
- Video (0 members)