Otrera

'''"Why should Amazons follow Jupiter, that foolish king of Olympus, when we can follow a queen?"

- Otrera, in The Son of Neptune. '''

Otrera (Οτρηρη in Greek) was a Greek demigod daughter of Ares and the founder and first Queen of the Amazons. She was also a consort of Ares and is the mother of Hippolyta, Antiope, Melaippe, and Penthesilea.

Otrera was sometimes considered the founder of the Temple of Artemis in Ephesus, which was closely connected with Amazons. She was also sometimes considered the founder of the Amazon nation, though many myths place the first Amazons much earlier.

The Son of Neptune
Otrera was one of the people Gaea revived from the Underworld using the Doors of Death. Otrera began persuading some of the Amazons to turn over to her side later planning to challenge the current leader of the Amazons, Hylla, to a fight to the death over the control of all the Amazons. Planning on winning the fight against Hylla, Otrera would help Gaea and the giants to destroy Camp Jupiter. It was around this time that Percy, Frank, and Hazel find the base of the Amazons in Seattle. Otrera wants to kill them right away, but Hylla says that it wasn't the Amazon way and has Frank and Percy put in cells. However, Otrera manages to have her followers guard the two demigods. Hylla comes up with a plan to help them escape and at the same time to make Otrera's guards and therefore Otrera look bad. After they escape, Otrera challenges Hylla for the role of queen. Hylla manages to defeat Otrera two nights in a row before Thanatos was freed from his chains and manages to keep Otrera from crossing into the land of the living again.

Trivia

 * Penthesilea and Hippolyta, other Amazon queens, were daughters of Otrera and her father, Ares.