Efreets

"Cruels and Hags and Incubuses, Wraiths, Horrors, Efreets, Sprites, Orknies, Wooses, and Ettins. In fact here were all those who were on the witch's side and whom the Wolf had summoned at her command."

- Chapter 14

Efreets were evil spirits that served the White Witch during the Hundred Year Winter, were present at the slaying of Aslan at the Stone Table, and fought in the White Witch's Army at the First Battle of Beruna.

They are often associated with Ghouls.

Trivia
The word is a variant of afreet, which denotes an evil demon or monster of Islamic mythology.