The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Mille Fuille (1 member)
- Millie (1 member)
- Minigames (8 members)
- Minigames in Suikoden (3 members)
- Minigames in Suikoden II (1 member)
- Minigames in Suikoden III (1 member)
- Miranda (1 member)
- Miroon (1 member)
- Miscellaneous (29 members)
- Miscellaneous in Suikoden (14 members)
- Miscellaneous in Suikoden II (4 members)
- Miscellaneous in Suikoden III (4 members)
- Miscellaneous in Suikoden Tactics (1 member)
- Miscellaneous in Suikoden Tierkreis (2 members)
- Miscellaneous in Suikoden V (2 members)
- Miscellaneous runes (4 members)
- Mission cards (175 members)
- Mitsuba (3 members)
- Mizuki (1 member)
- Mohsen (1 member)
- Mokumoku (1 member)
- Mondo (1 member)
- Moroon (1 member)
- Mudogara (1 member)
- Mueller (1 member)
- Mui (1 member)
- Mukumuku (2 members)
- Mun-Tsang (1 member)
- Murad (1 member)
- Muroon (1 member)
- Music (60 members)
- Music from Suikoden (1 member)
- Music from Suikoden V (1 member)
- Muto (1 member)
- Myra (2 members)
- Myriel (1 member)
- Mystery cards (22 members)
- Nabokov (1 member)
- Najin (1 member)
- Nakil (1 member)
- Nakula (1 member)
- Nalkul (1 member)
- Nalleo (1 member)
- Nanami (6 members)
- Nao (1 member)
- Narishuya (1 member)
- Nash Latkje (8 members)
- Nataly (1 member)
- Naval enemies in Suikoden IV (2 members)
- Naval warfare (17 members)