Also she brought forth Cratos (Strength) and Bia (Force), wonderful children. Hesiod states: 'And Styx the daughter of Ocean was joined to Pallas and bore Zelus (Emulation) and trim-ankled Nike (Victory) in the house. Kratos and his siblings are first mentioned in the Theogony, which was composed by the Boeotian poet Hesiod in the late eighth or early seventh century BC. Ancient Greek literature and art Theogony

In the preface to Fabulae by Gaius Julius Hyginus, Kratos is given the Roman name Potestas. They also appear in late eighteenth and nineteenth-century Romantic depictions and adaptations of the binding of Prometheus. Kratos and Bia appear in a late fifth-century BC red-figure Attic skyphos of the punishment of Ixion, possibly based on a scene from a lost tragedy by Euripides. In Aeschylus' Libation Bearers, Electra calls upon Kratos, Dike ('Justice'), and Zeus to aid her brother Orestes in avenging the murder of their father Agamemnon. He defends Zeus' oppressive rule and predicts that Prometheus will never escape his bonds. Kratos is characterized as brutal and merciless, repeatedly mocking both Hephaestus and Prometheus and advocating for the use of unnecessary violence. Kratos compels the mild-mannered blacksmith god Hephaestus to chain Prometheus to a rock as punishment for his theft of fire. Acting as agents of Zeus, they lead the captive Titan Prometheus on stage. Kratos and his sister Bia are best known for their appearance in the opening scene of Aeschylus' Prometheus Bound. According to Hesiod, Kratos and his siblings dwell with Zeus because their mother Styx came to him first to request a position in his regime, so he honored her and her children with exalted positions. Kratos is first mentioned alongside his siblings in Hesiod's Theogony. Kratos and his siblings Nike ('Victory'), Bia ('Force'), and Zelus ('Glory') are all the personification of a specific trait. In Greek mythology, Kratos, also known as Cratus or Cratos, is the divine personification of strength.

Kratos hades weapons