Demons

Samael
visually similar to Igor Kieryluk's demons

Imbra
Raven Demon, perhaps raven headed, or black feathered wings

Sychaeus Sil
Also known as the Whisper in the Woods, a demon that feeds of the souls of children offered to him as sacrifices.

Alulim
Wears a hood, not unlike an executioners

Dumuzid
looks like an old man, only takes the souls of the old and dying

Kish Akkad
Hairy, somewhat monkey-like, bulging knuckles on each fist like the Tapasa from berserk.