The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Clavis Alucard (19 members)
- Clear Files (24 members)
- Clone Phantasma Characters (16 members)
- Clothing (62 members)
- Clover (5 members)
- Code: Embryo Characters (20 members)
- Colosseum (6 members)
- Comiket 74 (4 members)
- Comiket 76 (19 members)
- Comiket 77 (7 members)
- Comiket 78 (5 members)
- Comiket 80 (8 members)
- Comiket 81 (12 members)
- Comiket 84 (9 members)
- Comiket 86 (1 member)
- Comiket 88 (6 members)
- Comiket 93 (5 members)
- Comiket 94 (1 member)
- Comiket 97 (7 members)
- Conflicts (5 members)
- Contents Kit (8 members)
- Continuum Shift Characters (38 members)
- Continuum Shift Extend Characters (38 members)
- Continuum Shift II Characters (38 members)
- Corpus Sepulcro: Requiem (1 member)
- Countdown Illustration (BBDW) (10 members)
- Crests (46 members)
- Cross Field (0 members)
- Cross Tag Battle Characters (58 members)
- Crossover Characters (34 members)
- Cypher Albar (9 members)
- DLC (142 members)
- DLC Characters (5 members)
- DVDs (3 members)
- Daisuke Ishiwatari (0 members)
- Daisuke Kawauchi (0 members)
- Dakimakura (30 members)
- Demi-Humans (5 members)
- Dengeki Game Festival 2011 (5 members)
- Destiny Child (40 members)
- Detonators (3 members)
- Deus Machina: Nirvana (174 members)
- Dimensional Boundary Contact Prime Field Es (2 members)
- Disambiguation Pages (3 members)
- Distortion Drive Images (36 members)
- Djeeta (99 members)
- Downtown (6 members)
- Drainage Facility (3 members)
- Drama CDs (6 members)
- Drei (176 members)