We drew four cards and got the following results:
*A brutish and tyrannical warlord and his uncouth thugs.
*A summoner of illusions and diversions, mild and of good humor, but gullible.
*An enemy champion, fearless and bellowing.
*A token indicating that its bearer speaks for the high general.
We then went around the table, each of us nominating some characters that we thought were implicit in this situation. We ended up with the following (though the last came a bit later - see below).
*The high general Natan
*Ku-Aya, Natan's champion wielding the Spear of Power
*El-Mash, a rider in Natan's service, bearing his token
*Romulus, the brutal warlord, with a chest of gold
*Borak, a simple-minded thug in Romulus's army
*Destorak, the illusionist, and Romulus's jester
*Parya of the Steppes, the High Sorceress and a wielder of wild magic
The kids chose Destorak and Romulus as their PCs; the parent El-Mash; the rest were my NPCs. The players then allocated attributes (d4, 2x d6, d8, d10, d12 to Covertly, Directly, For Myself, For Others, With Violence, With Love) and I added the simpler attribute arrays to my NPCs. And we worked out "particular strengths" (ie special abilities) for those characters who had them - Destorak's magic, Romulus's gold, El-Mash's Gift of Steeds (ie his preternatural riding ability) and Ku-Aya's Spear of Power.
Then we chose "best interests". I started, and chose for Ku-Aya that one of her best interests was to defeat Romulus in single combat. This gave the idea better than any explanation could, and also helped explain my earlier answer to one of the players' question "Are we, the PCs, working together?" - which I had answered "You don't have to." They worked out that I was going to be putting them in tricky situations, relative to their PCs', and my NPCs', best interests. I'm not going to list them all, but some that loomed large included Boraks' (have Romulus acknowledge me as an equal; gain Destorak's friendship), one of Natan's (never have El-Mash deliver his token), one of El-Mash's (to be victorious in the riding contest at Parya's great ziggurat), one of Parya's (have her kinship to ElMash remain secret), and both of Destorak's (seize the Spear of Power; have Parya take me on as her court illusionist). It was that last best interest that required us to add Parya to the cast of NPCs.