Elysium

Elysium (Japanese: エーリュシオン Ēryushion), also known as the Elysian Fields (Ancient Greek: Ἠλύσιον πεδίον, Ēlýsion pedíon) and commonly anglicized as Elysion, is ruled by Hades, who also rules the Underworld; it is depicted as a calm and idyllic paradise. Elysion is located on the other side of the Wailing Wall, and is the final resting place of the souls of the righteous and those who are selected by the gods.

Athena, the Bronze Saints with Athena' blood and Ikki with Pandora's gift, travel through the Hyperdimension  and emerge in Elysion. When Seiya arrives, some nymphs playing lyres with Thanatos and Hypnos fear him, due to the Saint's blood frightening them. Thanatos and Hypnos leave their own Temples to fight against the Bronze Saints. Later, the Bronze Saints rescue Athena from the urn and fight Hades's true body at the Temple of Hades.

Mythological roots
In certain Greek religious/philosophical sects and cults, the Elysian Fields are a conception of the afterlife that developed over time. Initially separate from the realm of Hades, admission was reserved for mortals related to the gods and other heroes. Later, it expanded to include those chosen by the gods, the righteous, and the heroic, where they would remain after death and live a happy life, indulging in whatever employment they had enjoyed in life.

Trivia

 * Hades states that with his death, Elysion and the Underworld he made would disappear, however by Saint Seiya Omega the Underworld at leasts seems to be in working condition again as seen by the efforts of Cancer Schiller, begging the question if Hades himself has also reformed.
 * In Roman mythology, although Hades (Pluto) is the overlord of the Underworld, Elysion is ruled directly by his father, Saturn (Kronos). The mythical Rhadamanthys is also said to escort and oversee souls in Elysion.

Appearances

 * Saint Seiya (debut)
 * Saint Seiya: Legend of Crimson Youth (mentioned only)
 * Hades: Chapter Elysion