インスピレーション

http://en.wikipedia.org/wiki/Tuatha_de_Dannan

http://en.wikipedia.org/wiki/Sidhe

説明

In Irish mythology the Tuatha Dé Danann are a legendary race of kings and warriors who ruled Ireland until they were overthrown by the Milesians. They were forced to live in the underworld where they became the fairy people of myth and folklore.