The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Twikaka (4 members)
- Under Night In-Birth Locations (4 members)
- Union (1 member)
- Unions (10 members)
- Unlimited VS (262 members)
- Unused Card Art (16 members)
- Unused Content (13 members)
- Uploaded via Campaign:BBDW Grimoires (150 members)
- Uploaded via Campaign:BBDW Icons (40 members)
- Uploaded via Campaign:BBRadio (3,730 members)
- Uploaded via Campaign:Character Palettes (1,148 members)
- Uploaded via Campaign:Merchandise (566 members)
- Uploaded via Campaign:Twitter (59 members)
- Uploaded via Campaign:Voice Files (160 members)
- User Scans (29 members)
- Utility templates (3 members)
- Valkenhayn R. Hellsing (598 members)
- Vampires (6 members)
- Variable Heart Characters (34 members)
- Varubtuke Source (5 members)