In Greek mythology, Zelus or Zelos /ˈziːləs/ (Greek: Ζῆλος, Zēlos, literally "zeal") was the son of Pallas and Styx. Zelus and siblings Nike (Victory), Kratos (Strength) and Bia (Force) were winged enforcers who stood in attendance at Zeus' throne and formed part of his retinue.