Kacy Duke

Kacy Duke is a celebrity fitness trainer who found herself pulled into Anna Delvey's orbit as a friend and confidante rather than a client. Poised, plainspoken, and unashamed of the affection she felt, she recounts their friendship to the reporter piecing Anna's story together, defending her even as the evidence mounts.

Laverne Cox plays her with unhurried self-assurance, a woman who refuses to perform embarrassment for anyone's benefit. The show lets her loyalty sit uncomfortably alongside the con, and Cox never resolves that tension for the viewer — she simply lets Kacy mean what she says, which is far more unsettling than easy skepticism would be.