The sound is both masculine and feminine, it speaks of aurora but the "o" of the male gender dominates and if you read it in English you hear IO. So whoever wears it is the protagonist, he makes room, given the shape literally, among the others as the dawn makes room in the darkness. It awakens those around it. It dictates times and rules. It is light, and in front of a rising sun don't we need dark glasses?
Eos is the goddess of the dawn. She precedes her brother Elios, the Sun, she goes to call him. So she is always ahead. She announces the day. She awakens.