The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Anime (2 members)
- Anime Images (3 members)
- Article management templates (1 member)
- Article stubs (23 members)
- Blog posts (0 members)
- Browse (8 members)
- Candidates for deletion (0 members)
- Chapters (36 members)
- Character Artwork (5 members)
- Characters (21 members)
- Clubs (1 member)
- Disambiguations (0 members)
- Episodes (13 members)
- Females (18 members)
- Galleries (5 members)
- Groups (1 member)
- Help (0 members)
- Images (8 members)
- Infobox templates (3 members)
- Koisuru Asteroid (9 members)
- Koisuru Asteroid Wiki (2 members)
- Main Page Templates (7 members)
- Maintenance (2 members)
- Males (1 member)
- Manga (2 members)
- Manga Images (1 member)
- Media (7 members)
- Music (8 members)
- Pages using ISBN magic links (4 members)
- Promotional Images (7 members)
- Songs (7 members)
- Stubs (0 members)
- Template Images (1 member)
- Template documentation (34 members)
- Templates (37 members)
- Templates/Context-link (6 members)
- Templates/Infobox (8 members)
- Templates/Navbox (1 member)
- Templates/Notice (1 member)
- Templates/Quote (2 members)
- Theme Images (5 members)
- Volumes (3 members)