Alright, so the Doomstone books? I think you mean the series by the late author William King—'The Doomstones' for the Warhammer setting? Those old-school quest novels. The core group is basically a classic adventuring party. You've got Florin d'Artaud, the Bretonnian noble turned mercenary captain who leads the whole outfit. He's all charm and ambition, kind of the reckless heart of the group. Then there's Lorenzo, his Tilean companion. He's the brains and the cautious one, constantly trying to rein Florin in. They bicker like an old married couple, it's great.
Beyond them, you've got a rotating cast of soldiers from their mercenary band, the Bordermen. Jocelin the Leper is a standout—a knight with a terrifying condition that makes him both tragic and fiercely dangerous. Later books introduce more key figures like the wizard Katerina, who brings a lot of political and magical complications. The antagonists shift with each stone they hunt, but a constant thorn in their side is the sinister Skaven, the rat-men who also want the Doomstones for their own vile ends. The dynamic is less about a single villain and more about the party vs. the corrupting influence of the stones themselves.