This is a list of various NPCs that you can choose from for the purposes of Allies, Sworn Enemies, Blackmail, or the like. These aren't the only options available to you, of course, but they do provide you with some established options that you can utilize.
The number in parenthesis after the NPC's name is their current Status, while the Family name in parenthesis is the character's Family name prior to marrying into a new Clan.
Note that these characters aren't present in this game; they're just NPCs that have been established as existing in Rokugan.