Lost soul (Doom Eternal)

The lost soul returns in Doom Eternal. It can spawn as an independent enemy or be spawned by the pain elemental. Pain Elementals can throw the lost souls spawned by them like grenades.

Tactical Analysis
Lost Souls are unusually weak to the Ice Bomb, and will be instantly killed by it.

Lore
Lost Souls are derived from the Damned- the countless unfortunate mortals taken to Hell as slave labor. Those of the Damned who are no longer able to work are sent to vile pits where their souls are extracted for later use; the souls which escape after being extracted take a physical form as Lost Souls, being driven hopelessly insane in the process.

Haunted by fragmented memories of their old lives, they roam endlessly seeking something that can end their suffering.