Anemoi four Anemoi and several minor wind gods are involved in the defense of Mount Olympus against Kronos (the Titan Cronus), the first series's chief antagonist. Both the Greek and the Roman forms of the Anemoi appear in Riordan's second series. Boreas is a central character in "The Lost Hero", and his children Khione, Calais, and Zetes continue to have important roles throughout the series. He resides in Montreal, and is described as "sturdily built...with dark purple wings" when in his Greek form, and as "taller and thinner" when Roman. "Notus/Auster appears in "The House of Hades" as a counselor of
Greek mythology and the Near East. Adonis seems to be the Greek counterpart—more clearly in cult than in myth—of a Near Eastern "dying god". Cybele is rooted in Anatolian culture while much of Aphrodite's iconography may spring from Semitic goddesses. There are also possible parallels between the earliest divine generations (Chaos and its children) and Tiamat in the "Enuma Elish". According to Meyer Reinhold, "near Eastern theogonic concepts, involving divine succession through violence and generational conflicts for power, found their way ... into Greek mythology". In addition to Indo-European and Near Eastern origins, some scholars have speculated on the debts of Greek