Ceres

Ceres is Demeter's Roman counterpart. As Ceres, she becomes more disciplined, militaristic, and warlike. While Greeks envisioned Demeter as the one who gifted mankind the gift of Agriculture, Romans believed that the laws and rites of Ceres protected all the activities of the agricultural cycle. She might have children or descendants at Camp Jupiter near San Francisco. She is one of the major gods.

History
Ceres was daughter of Saturn and Ops. Sicily, Attica, Crete, and Egypt, claim the honor of her birth, each country producing the ground of its claims, though general suffrage favors the first. In her youth, being extremely beautiful, Jupiter fell in love with her, and by him she had Proserpina. For some time she took up her residence in Corcyra, so called in later times, from a daughter of Asōpus, there buried, but anciently Drepănum, from the sickle used by the goddess in reaping, which had been presented her by Vulcan. Thence she removed to Sicily, where the violence of Pluto deprived her of Proserpina. Disconsolate at her loss, she importuned Jupiter for redress; but obtaining little satisfaction, she lighted torches at the volcano of Mount Etna, and mounting her car, drawn by winged dragons, set out in search of her beloved daughter. This transaction the Sicilians annually commemorated by running about in the night with lighted torches and loud exclamations.

It must be owned that Ceres was not undeserving the highest titles bestowed upon her, being considered as the deity who had blessed men with the art of cultivating the earth, having not only taught them to plough and sow, but also to reap, harvest, and thresh out their grain; to make flour and bread, and fix limits or boundaries to ascertain their possessions. The garlands used in her sacrifices were of myrtle, or rape-weed; but flowers were prohibited, Proserpine being carried off as she gathered them. The poppy alone was sacred to her, not only because it grows amongst corn, but because, in her distress, Jupiter gave it her to eat, that she might sleep and forget her troubles. Cicero mentions an ancient temple dedicated to her at Catania, in Sicily in which the offices were performed by matrons and virgins only, no man being admitted.

The Son of Neptune
Ceres is mentioned by Hazel when talking to Karpoi, when asking why they don't serve Ceres, but they state that they hate her because they were wild and Ceres told people how to cultivate them.

Trivia

 * The word cereal derives from Ceres.
 * The Cerealia festival was celebrated on the 19th April in honor of Ceres and connected with the growth of corn.
 * Ceres is depicted on the Seal of New Jersey as a symbol of prosperity.
 * An asteroid is named after Ceres.