Ereshkigal is the Goddess of the Underworld in Sumerian myth. She freely wields a spear-like cage; at times stabbing the enemy with it, at times imprisoning souls, at times summoning lightning, she is the fearsome ruler of the underworld. Having carried out her duties of administrating the underworld since birth, she is a goddess that disappeared along with the Age of Gods without ever knowing of the world above, or of freedom.

(Source: TYPE-MOON Wiki)