The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Akane Teruhiko (116 members)
- Akatsuki (34 members)
- Akihiko Sanada (26 members)
- Akilico (10 members)
- Akio Osafune (13 members)
- Akira Kamewari (58 members)
- Alchemists (20 members)
- Altar (63 members)
- Alter Memory Characters (34 members)
- Alter Memory Episodes (12 members)
- Alternative Dark War Characters (62 members)
- Alucard Castle (38 members)
- Alucard Clan (10 members)
- Amane Nishiki (330 members)
- Amano, Kiyoko (14 members)
- Amanohokosaka Clan (10 members)
- Amaterasu Unit (1 member)
- An evil sign Characters (1 member)
- Animations (17 members)
- Anime (2 members)