In Greek mythology, Bia is the personification of force, power, and compulsion. She is the daughter of the Titan Pallas and the Oceanid Styx, and sister to Nike (Victory), Kratos (Strength), and Zelus (Zeal). Together with her siblings, Bia was a constant companion and enforcer of Zeus's will, particularly after they sided with him during the Titanomachy. While often silent in myths, her presence signifies overwhelming and unyielding might, notably in the binding of Prometheus.