The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Tessai (1 member)
- Tetsu (1 member)
- The Infinity (3 members)
- Third Force cards (308 members)
- Thomas (1 member)
- Thorwad Albreck (1 member)
- Thrash (1 member)
- Toma (1 member)
- Tomo (1 member)
- Toran Republic cards (168 members)
- Tov (1 member)
- Trade items in Suikoden II (1 member)
- Travis (1 member)
- Trishtan (1 member)
- Troy (4 members)
- Tserendrum (1 member)
- Tuta (1 member)
- Twaikin (1 member)
- Ufred (1 member)
- Ugetsu (1 member)
- Unicorns (0 members)
- Unite Attacks (72 members)
- Unite Attacks in Suikoden (26 members)
- Unite Attacks in Suikoden II (35 members)
- Unite Attacks in Suikoden III (8 members)
- Unite effect cards (440 members)
- Unlocalized abilities (1 member)
- Unlocalized albums (37 members)
- Unlocalized articles (24 members)
- Unlocalized characters (217 members)
- Unlocalized enemies (16 members)
- Unlocalized events (2 members)
- Unlocalized games (3 members)
- Unlocalized locations (69 members)
- Unlocalized lore (6 members)
- Unlocalized organizations (12 members)
- Unlocalized publications (22 members)
- Unlocalized races (4 members)
- Unlocalized runes (2 members)
- Unlocalized weapons (8 members)
- Urda (1 member)
- Utze (1 member)
- Valeria (2 members)
- Valfred (1 member)
- Vampires (0 members)
- Varkas (3 members)
- Vaslof (1 member)
- Viki (6 members)
- Viktor (8 members)
- Vincent Vingerhut (1 member)