The Divine Wind

The Divine Wind is a religion practised nearly exclusively by the Eastern Kingdom in Trepheon, which espouses the belief that an air spirit far more powerful than any other spirit known as The Divine Wind exists and is the protector of the people of Azura, being in control of the wind and air. It is also believed that The Divine Wind chose the Easterners as its chosen people and is the one who guided Eastern ships to the various islands that created their empire, as well as the belief that the Eastern empress is divine and their mandates blessed by The Divine Wind, with the first ruler Shia Shotaro considered the first one to be blessed by The Divine and the one that lead the Easterners to their land.
However, it is also widely believed that the fall of the Easterners' empire was caused by a lack of faith and corruption of the people, with many priestesses presently attempting to engage the people of the East and bring them back to the path of righteousness in order to restore their favour with The Divine Wind. The clergy of this faith is largely composed of women, and whilst the Empress is considered the arm of justice and protection of faith, the Eastern Matriarch who resides in the island fortress of Kazena is the head of the religion and believed to be in direct contact with the Divine Wind.
The Matriarch, traditionally, is a former Empress who will decide after reigning for 20 years whether they will ascend to Matriarchy. If the Empress dies before having the chance to become a Matriarch, the position runs to the heir's sister. However, if the heir does not have a sister, then it is considered a sign from the Divine Wind that the Kingdom's faith is not strong enough to be in direct contact with the spirits.