The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Scharff (1 member)
- Schtolteheim Reinbach II (1 member)
- Schtolteheim Reinbach III (1 member)
- Scott (1 member)
- Screenshots (83 members)
- Scribes (0 members)
- Sea effect cards (4 members)
- Sebastian (2 members)
- Selma (2 members)
- Semias (1 member)
- Seneca (2 members)
- Setsu (1 member)
- Seu Jin (1 member)
- Shairah (1 member)
- Sharmista (1 member)
- Shield equipment (8 members)
- Shield equipment in Suikoden (4 members)
- Shield equipment in Suikoden II (8 members)
- Shields (1 member)
- Shields in Suikoden (0 members)
- Shigure (1 member)
- Shilo (1 member)
- Shinro (1 member)
- Ships (14 members)
- Shiramine (1 member)
- Shiro (1 member)
- Shoon (1 member)
- Shu (2 members)
- Shula Valya (1 member)
- Shun Min (1 member)
- Sialeeds (1 member)
- Sierra Mikain (4 members)
- Sign Rare cards (40 members)
- Sigurd (2 members)
- Silva (1 member)
- Simeon (1 member)
- Siu Jin (1 member)
- Six Clans cards (88 members)
- Skald Egan (1 member)
- Snowe Vingerhut (6 members)
- SoLaTi (1 member)
- Social groups (4 members)
- Social groups in Suikoden III (1 member)
- Social groups in Suikoden V (1 member)
- Solis Raulbel (1 member)
- Solon Jhee (1 member)
- Songs (5 members)
- Sophia (1 member)
- Sorensen (1 member)
- Sou Jin (1 member)