Scarlet Vexation — A minor imp, noted for spreading pestilence.
Search Sphere — A sturdy imp with giant scaly ears and a single bristled nostril, which makes it particularly sensitive to magical pulsation.
Shubit — Jessica Whitwell's djinni. Favours the guise of a bear.
Simpkin — A small lime-green , bow-legged foliot serving Sholto Pinn. One of the few spirits who enjoys his servile status; perished during a golem attack.
Spirit — Any supernatural being, from mites to marids. Magicians label them all demons.
Sprite — A lowly demon that is weaker than an imp.
Succubus — A seductively shaped djinni in female form.
Teti — A djinni who served Ptolemy. He died in battle protecting his master.
Truklet — An imp enslaved to Clive Jenkins. He perished in the Demon Revolt while trying to expose Bartimaeus.
Utukku — A type of djinni known for its unintelligent devotion to violence; can be very easily fooled.
Wil-o'-the-wisp — Small spirits usually visible as flickering flames. They were once used by magicians to lure trespassers off remote paths into pits, quags, or (latterly) open manholes.
Xerxes (aka Eagle-beak) — An utukku serving as a sentry in The Tower of London.
Yole — A demonic servant to Jane Farrar.
Zeno — A brave djinni who flew straight to the source of the disturbance (the golem) at the National Gallery and was never seen again.