Otrera (Ancient Greek: Ὀτρήρη) was, in Greek myth, founder and first queen of the Amazons, consort (or, in one version, daughter) of Ares, and mother of the Amazon queens Hippolyta and Penthesilea. Tradition credits her and the Amazons with founding the shrine of Artemis at Ephesus — a claim Pausanias rejects in favour of a more ancient local cult.
Adapted from Wikipedia, "Otrera" · CC BY-SA 4.0
I.Queen and mother
Otrera is remembered as queen and founding mother of the Amazon nation. By Ares she bears Hippolyta and Penthesilea, both later queens; a minority genealogy makes her Ares's daughter instead of his consort. Apollonius of Rhodes places three Amazon cities on the plain of Doias and mentions a desert-island temple of Ares shared by Otrera and Antiope among ravening birds.
II.Ephesus and Artemis
The warlike Amazons were credited with founding the Temple of Artemis at Ephesus — setting an image under an oak, with Hippolyta leading ritual dance in arms. Pindar, as Pausanias reports, had the Amazons found the sanctuary during their campaign against Athens and Theseus, and sacrifice there again when fleeing Heracles or Dionysus. Pausanias himself insists the cult is far older and that a native Coresus, not the Amazons, founded the temple.
Separate traditions send Amazons against Troy and have Bellerophon defeat them; Otrera herself is not always named in those campaigns. The atlas id `otrera-amazon` marks her as the Amazon founder, not a generic war-heroine.