Well, the two absolute anchors of 'The Thread Collectors' are Stella and Lily. Stella's a young enslaved woman in Louisiana, stitching coded maps into quilts for the Union army with threads she dyes from the land around her. Lily's a wealthy Jewish abolitionist up in New York, using her social position and resources to support the cause from a very different angle. Their stories run parallel, connected by the quilts and the war, but they never actually meet, which I think is a fascinating choice—it emphasizes how the fight was woven from countless separate, vital efforts.
Then you've got William, Lily's husband, a composer who's more focused on his music than the war, creating a tension in their marriage. And on Stella's side, there's her community, especially the men she's trying to help reach freedom. The real key character, though, might be the 'thread' itself—the literal and metaphorical connections of sacrifice, art, and information that bind these disparate lives together against a brutal backdrop. It’s less a story about a single hero and more about the fabric of a movement.