Stuck in grey

Long before the start of the first holy war there was a powerful source of beings. They helped both the demon and goddess race. Never once choosing sides. The demons and goddess tried to recruit the creatures once more, only to find their home that was in ruins with no sign of life nor survival anywhere.
The race was presumed extinct and gone.
The war raged and was soon over as of which the species lived safely without the burden of loss. They stayed hidden to continue their story for more than 3,000 years.

That was until their magical power was revealed and they hey disappeared as soon as they came.

this did not go unnoticed since the demon king and the Great deity sent candidates to retrieve them and to have them gain their side.
Zeldris being the demon kings
and a unknown angel who was almost non-existent

Even so the power would no be given up so easily.