Harmonious choir of the words

Harmonious choirs of the words (often shortened to just harmonious choirs) were highly intelligent and powerful celestials.

Description
Harmonious choirs looked like balls of light some in diameter, with a smooth, not-quite-human face floating within and a stream of runes floating from the mouth. The coloring of the face and the runes varied from individual to individual, though most were of the cooler colors of blues, greens, and purples.