Bia is the Greek personification of Force, the daughter of Pallas and Styx, and sister of Nike, Kratos and Zeleus.
She and her siblings were constant companions of Zeus. They achieved this honour after supporting Zeus in the war of the Titans along with their mother. Bia is one of the characters named in the Greek tragedy Prometheus Bound, written by Aeschylus, where Hephaestus is compelled by the gods to bind Prometheus after he was caught stealing fire and offering the gift to mortals. Bia along with a handful of other gods, were rumored to slay the last of the unicorns, and then resurrected them into what we now call, the "Hippo".