The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Male accessories (1 member)
- Male accessories in Suikoden (0 members)
- Male cards (1,072 members)
- Manaril (1 member)
- Manga releases (9 members)
- Mantors (1 member)
- Manu (1 member)
- Mao (1 member)
- Maps (2 members)
- Maps in Suikoden IV (1 member)
- Marica (2 members)
- Marica? (1 member)
- Marina (1 member)
- Maroon (1 member)
- Marscal Godwin (1 member)
- Mastermind cards (40 members)
- Mathias (1 member)
- Mathiu Silverberg (1 member)
- Maximillian (1 member)
- Maximus Zaphir (1 member)
- Maxine (2 members)
- Mazus (2 members)
- Meamei (1 member)
- Meg (7 members)
- Mekumeku (1 member)
- Mel (2 members)
- Mephitis (1 member)
- Mermaids (5 members)
- Meroon (1 member)
- Meruvis (1 member)
- MiFaSo (1 member)
- Miakis (1 member)
- Micky (1 member)
- Mike (1 member)
- Mikumiku (1 member)
- Milia (1 member)
- Milich Oppenheimer (6 members)
- Military forces (51 members)
- Military forces from Suikoden publications (1 member)
- Military forces in Genso Suikoden Tierkreis Hoshikuzu no Shiro (2 members)
- Military forces in Genso Suikoden Tsumugareshi Hyakunen no Toki (3 members)
- Military forces in Genso Suikogaiden Vol.2 (1 member)
- Military forces in Suikoden (6 members)
- Military forces in Suikoden II (7 members)
- Military forces in Suikoden III (6 members)
- Military forces in Suikoden IV (2 members)
- Military forces in Suikoden Tierkreis (7 members)
- Military forces in Suikoden V (10 members)
- Millay (1 member)
- Mille Feuille (2 members)