Etherealki, (singular: Etherealnik) or the Order of Summoners, are Grisha whose power lies in the manipulation of different natural elements. This Order is divided into Squallers, Inferni and Tidemakers. Loosely referred to as Summoners, Etherealki typically train in pairs; Inferni partner with other Inferni, while Squallers and Tidemakers usually train together. Alina Starkov and the Darkling, a Sun Summoner and Shadow Summoner respectively, are also technically considered Etherealki.
In the Second Army, Etherealki wear blue kefta (with the exception of the Darkling).
After the events of the Shadow and Bone trilogy, the Etherealki are led and represented by Zoya Nazyalensky in the Grisha Triumvirate. The new sun summoners created by Alina (including Vladim Ozwal) are now part of this Order, and are trained with them.
- Main article: Squallers
Squallers are Summoners who can raise or lower air pressure to create storms, gusts, and manipulate objects. They wear blue keftas embroidered in silver.
- Main article: Inferni
Inferni summon combustible gases such as methane or hydrogen, though they still need a flint to start a spark. They wear blue keftas embroidered in red.
- Main article: Tidemakers
Tidemakers manipulate temperature to summon and control water. They wear blue keftas embroidered in light blue.
- The word Etherealki comes from classical Greek αἰθήρ (aithḗr) which means sky or heaven. But aithḗr also is the fifth element in the ancient science of four elements which include water, air, and fire, which can be summoned by the Etherealki.