Citizens of Aeyaviel believe that it was the Hierophant that was the first of their people. No one knows what their true identity is, but a vast majority believe that she/he was the creator of all angels and she had a vital role in creating Aeyaviel as a safe haven for angels. Most assume that the Hierophant is a female, but records do not support or deny such claims. The Hierophant is also presumed to be the First Oracle, but evidence shows otherwise.
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Before Aeyaviel became an established nation in Naestrirea, there was only one, The Hierophant. She was a counselor, a savior, and a mother to those that would later become Aeyavielans. In the Beginning, she listened to the prayers of humans that suffered throughout the realm. They wanted a place they could call home, they wanted the exploitation of their species to cease, but most of all, they wanted peace.
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She began to teach the humans the art of tranquility. Citizens of other nations thought that the Hierophant was fictitious and that the humans were blindly following delusions. However, these doubts were silenced when reports began circulating throughout Naestrirea. They spoke of winged creatures spreading blessings to the ill, troubled, and listless. 
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These creatures were considered the purest beings because no amount of darkness could creep into their hearts or alter their course. However, that thought changed when some began misusing their power.
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In 238 AC, there were battles between humans that wished to gain the power of the angels and the angels themselves. Many deceived angels into blessing them, but ultimately stole their power and became dark angels.
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Ever since this incident, Aeyavielans do not intervene in mortal matters unless the balance of the world is at stake. Their presence is only noticeable to those that are most observant. Their lands are enshrouded by an intangible cloak similar to that of the Vale of Aestreria.