Aresia

Aresia was a rogue Amazon who was determined to purge every male from the planet. She also is the adoptive sister of Diana. When she was a young girl, Aresia's country (possible to be Kaznia) was ravaged by war. In order to escape the chaos, the girl and her mother fled aboard a cargo ship. During the ship's journey, pirates attacked the vessel, raided the ship for all the goods and supplies that were aboard, before opening fire on the ship and destroying it. Aresia was the only other person who survived the attack apart from the ship's captain, a man. She was barely conscious and held on to a shard of the wooden ship. The ship's captain took Aresia and swam her to safety on the shores of Themyscira. This valiant effort came at the cost of his own life; he suffered a fatal heart attack as a result of the strain put on his heart. Hippolyta found Aresia and the captain on the beach. She buried the noble captain, the only man ever buried on Themyscira, but kept his existence a secret because she didn't think the captain was important enough to be mentioned. After these events, Aresia was adopted by the Amazon Queen who raised her to adulthood along with Diana. While on the island, she was magically endowed with Amazon strength and was taught in Amazon fighting techniques. However, Aresia learnt misandrist philosophies from Hippolyta; especially taking to the idea of men not being necessary. As part of Aresia's final training and tests to truly become an Amazon was to live by herself in complete solitude; presumably to reflect upon whether or not she truly wanted to become an Amazon and truly renounce any ties to the outside world. During that time, no Amazon was allowed to come check up on or talk with her. While in the tower, Aresia took this time to read books she had somehow acquired from the outside world about biology, chemistry and magic, which allowed her to form her plan to exterminate men from the world.