Valkyries

Valkyries is a race made exclusively to Seven Deadly Sins Grand Cross Mobile Game in the Ragnarok storyline.

Overview
Valkyries are known to serve the Norse gods of Midgard and guide warriors spirits to the afterlife of Valhalla when they die in combat. Not much is known about them due to their rules of forbidding any info on them to be given out according to Megellda and they are rarely seen according to Grimnir. They live in under strict guidelines and one mistake can send them to Earthly realm as Megellda said she saw it happened to another Valkyrie she knew.

It is later revealed they serve the Norse Gods under Odin and other gods such as Heimdailr who guide strong souls to Valhalla and if they fail too much they can redeem themselves by fighting their top soldiers and must win 51 out of 100 battles to pass.

Appearance
Valkyries have appearance identical to humans with armor with helmet wings on them. Megellda's case as she shown to be short little girl implying some of them might be like her as well. Megellda shown to have wings to hover in the air implying they probably can fly.

Physiology
Megellda said she been looking for a warrior with a strong soul for thousands of years implying Valkyries have a long lifespan of thousands of years at least.