The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 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)
- Another Dark (2 members)
- Another Dark Kagura (115 members)
- Another Dark Mai (134 members)
- Apocalypse (2 members)
- Apostles (3 members)
- April Fools' 2017 (8 members)
- April Fools' 2018 (25 members)