The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Ars Armegis (3 members)
- Ars Armegis Wielders (4 members)
- Artificial Causality Phenomenon Weapon (7 members)
- Artificial Humans (12 members)
- Arts (7 members)
- Asano (0 members)
- Asano, Kenta (7 members)
- Asphyxia (13 members)
- Audio (13,511 members)
- Automations (5 members)
- Avenge (158 members)
- Ayame Yayoi (3 members)
- Azrael (449 members)
- Azure (21 members)
- Azure Shrine Maiden (2 members)
- BBDW Character (65 members)
- BBDW Event (46 members)
- BBDW Grimoire (161 members)
- BBDW Sprite (33 members)
- BLUE (3 members)