Kassandra (Greek: Κασσανδρα; 458 BCE – 2018 CE), renowned as the Eagle Bearer, nicknamed the West Wind by Xenia,[3] and bestowed the title of Keeper by Aletheia,[4] was a Spartan mercenary who operated in Greece during the Peloponnesian War. She was the daughter of Myrrine and Pythagoras, the step-daughter of Nikolaos, and the older half-sister of Alexios. Through her son Elpidios, she was also an ancestor to Aya, one of the co-founders of the Hidden Ones. Born a hybrid, Kassandra possessed an unusually high concentration of Isu DNA, which allowed her to wield the Spear of Leonidas, a Piece of Eden granting superhuman abilities which had previously belonged to her maternal grandfather, King Leonidas I of Sparta. During her travels as a mercenary, Kassandra came into conflict with the secretive Cult of Kosmos, an organization intent on controlling the entire Greek world. After discovering that the Cult was targeting her bloodline and was responsible for a traumatic incident which had separated her from her family in her youth, Kassandra embarked on a quest for revenge while also attempting to reunite her broken family. In addition to the Cult, Kassandra also opposed the Order of the Ancients, who sought to eliminate her due to her nature as a hybrid and also for allying herself with Darius and his son, Natakas. For her opposition against the Cult and the Order, Kassandra is considered one of the early precursors to the Assassin Brotherhood.[5] After successfully vanquishing the Cult and the Order from Greece, Kassandra met her father Pythagoras, who entrusted her with the Staff of Hermes Trismegistus, another Piece of Eden which granted her biological immortality. Subsequently, on the instructions of the Isu Aletheia, whose consciousness was stored inside the Staff, Kassandra embarked on a millenia-long journey across the globe to find and destroy dangerous Pieces of Eden. During her quest, Kassandra would cross paths with the Hidden Ones, becoming one of their allies. She would also become more insular and reserved and decide to operate in the shadows due to her reluctance to form connections with people, until an encounter with the Viking shieldmaiden Eivor Varinsdottir in the 9th century CE helped her in this regard. In 2018, Kassandra met the Assassin Layla Hassan, who had relived her genetic memories to find the Gateway to the Lost City. Instructed by Aletheia to relinquish the Staff to Layla, Kassandra did so after asking the Assassin to destroy all the Pieces of Eden and restore the balance between order and chaos, and subsequently passed away.