Celestial Knights
From Age of Sigmar - Lexicanum

A Liberator of the Celestial Knights.
The Celestial Knights are a Stormhost of the Stormcast Eternals, wearing dark blue armor. The armor of the Celestial Knights represents the gloaming skies of Azyr at twilight, yet they bring the light of Sigmar to benighted lands.[1]
Notable Members
Sources