The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- I link cards (138 members)
- Icas (1 member)
- Icon templates (20 members)
- Igor (1 member)
- Ilia Barcai (1 member)
- Illustrations by Fujita Kaori (1 member)
- Illustrations by Hirooka Masaki (1 member)
- Illustrations by Ishikawa Fumi (1 member)
- Illustrations by Iwama Junko (2 members)
- Illustrations by Ohtsuki Beruno (0 members)
- Illustrations by Okashila. (1 member)
- Illustrations by Suzuki Takeshi (1 member)
- Illustrations by Yashioka Sho (0 members)
- Images of poor quality (59 members)
- Independence Faction cards (58 members)
- Indrik (1 member)
- Infobox templates (86 members)
- Ingolf (1 member)
- Irin (1 member)
- Isabel (1 member)
- Isato (1 member)
- Iskas (1 member)
- Island Nations cards (14 members)
- Items (71 members)
- Items in Suikoden (34 members)
- Items in Suikoden II (5 members)
- Items in Suikoden III (2 members)
- Items in Suikoden IV (2 members)
- Items in Suikoden V (1 member)
- Izak (1 member)
- Jabba (1 member)
- Jacques (1 member)
- Jagwan (1 member)
- Jale (1 member)
- Jandak (1 member)
- Jango (1 member)
- Jansen (1 member)
- Jeane (4 members)
- Jeremy (1 member)
- Jewel (2 members)
- Jidan Guisu (1 member)
- Joker (2 members)
- Josephine (1 member)
- Joshua Levenheit (1 member)
- Jowy Atreides (7 members)
- Judiela (1 member)
- Julie Latkje (2 members)
- Juppo (2 members)
- Kahn Marley (1 member)
- Karen (1 member)