Shimmering particles of metallic and rainbow colors shower the area. They fall gracefully throughout the air, clinging to previously unseen shapes. They are vaguely humanoid, but their bodies roil and churn as if they were made from living air.

Spoiler: Sefariel, Aron and Atticus
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You recognize these creatures for what they are; Invisible Stalkers. Creatures of the plane of air that are often summoned by mortals to serve as assassins due to their natural invisibility and flight. The often become jaded in such service and hateful of mortals. Apparently Fairwind keeps a pair of them as guards for his estate.