The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Hiroaki Masuzawa (0 members)
- Hiromi Kageyama (0 members)
- Hitaki, Yuu (8 members)
- Homura Amanohokosaka (122 members)
- Hotsuma Suzuki (0 members)
- Houichirou Hazuki (8 members)
- Humans (57 members)
- Hyde (61 members)
- Icons (635 members)
- Ignis Clover (113 members)
- Ikaruga Federation (3 members)
- Ikaruga Region (5 members)
- Illusionary Creatures (2 members)
- Images without source (11 members)
- Immortal Breakers (3 members)
- Imported vocabulary (8 members)
- Infobox Templates (13 members)
- Innocent Black Characters (6 members)
- Inoue (0 members)
- Inoue, Takumi (6 members)