Sharon "Athena" Agathon

Sharon Valerii's copy — a Cylon sleeper agent who doesn't know it herself — begins as a Galactica Raptor pilot, sharp, capable, and quietly devoted to Chief Tyrol. Once the truth surfaces and she chooses humanity over her own model, she takes the callsign Athena and fights to prove that choice means something, one dangerous mission at a time.

Grace Park plays two versions of the same face across the show, and the trick isn't the twist — it's how she builds an entirely separate person from near-identical material, then commits Athena to a loyalty nobody will fully trust. Every scene carries the weight of having to earn what should be automatic: belonging.