Underworld

The Underworld is the mysterious virtual world in which the Alicization Arc takes place

Gods
The people of Underworld recognize at least Twelve gods:
 * The Goddess of Creation Stacia (創世の神ステイシア) - the main goddess of the Human Empire, as well as the goddess of life and creation. According to the legends, she governs the existence of all animate and inanimate objects in the form of Life, displayed in the Stacia Window, and summons those whose Life expires to her side. Marriages in the Human Empire are pledged to Stacia, who blesses the couple and allows them to have children.
 * The Light God Haldor (闇神ベクタ) -
 * The Sky Goddess Marin (闇神ベクタ) -
 * The Sun Goddess Solus (陽神ソルス) - the goddess of Underworld's star, Solus, that provides blessings to the world in the form of sunrays that increase the surrounding Sacred Power. Her blessings diminish during the night when the Solus sets.
 * The Land Goddess Terraria (地神テラリア) - the goddess of the earth that provides blessings to plants and protects metalworkers and craftsmen. Provides Sacred Power through the earth, though this source of power is very limited in cities and above the ground.
 * The River Goddess Aquaria (闇神ベクタ) -
 * The Healing Goddess Artina (癒しの女神アルティニャ) -
 * The Weather Goddess Merag (天気の女神メラグ) -
 * The God of Souls Heath (闇神ベクタ) -
 * The Darkness God Vector (闇神ベクタ) - the ruler of the Dark Territory and the only god worshiped there. Vector is said to love pulling pranks on humans, in the form of diseases or kidnapping people and stealing their memory. Vector was also the originator of the Dark Arts.
 * The Goddess of the Moon Lunaria (月の神ルナリア) - the goddess of the moon who controls the dreams of Underworld's residents.