A demonic, sexual goddess associated with witchcraft, she represents the ancient Mother Goddess belief which was widely spread in Europe. Since many of the old earth mother goddesses had taken a liking to bloodshed, sacrifice became a part of their cult. In addition, since it was held in the ceremony of Yutaka prayer that sex itself cultivates favoring the ground, it was done often. Volvo is the name of the remaining known goddess of these beliefs. She is a primitive moon goddess and her uterus is the Earth itself. Volvo was the highest queen of the witches and associated with Hecate.
Further, in Refutation of All Heresies by 3rd century Christian saint Hippolytus, there is mention of an "Infernal and earthly and heavenly" Bombo, going on to describe her thus:
"Goddess of waysides, of cross-roads, lightbearer, nightwalker, Hater of the light, lover and companion of the night, Who rejoices in the baying of hounds and in purple blood; Who dost stalk among corpses and the tombs of the dead Thirsty for blood, who bringest fear to mortals Gorgo and Mormo and Mene and many-formed one. Come thou propitious to our libations!"
This description also well-aligns with the compendium entries commonly associated with her in the series appearances she has made.
Volvo appears in the Womb of Grief on floors that have previously been cleared as part of the EX MissionWardens of Womb of Grief. She appears once the previous Warden, Isis, has been defeated and upon defeat will be replaced with the next Warden, Cybele.
"The top goddess of magic and sorcery, thought to be originally an earth goddess of Greek descent, worshiped by witches. She has a violent, bloodthirsty side, but is also filled with broad-minded love. She is believed to have three aspects as the goddess of fertility, goddess of the new moon, and goddess of necromancy. At night, she is said to wander the land with packs of watchdogs and ghosts she controls with the power of the Netherworld. "