Searching about spiritual ascension of themselves and next level of Aura ability, the [Spirit-folk] could be one of most oldest group in second world of Remnant on aspect of Aura study and research. Originally, they did extensive length in exploration and research of advanced aspect on Aura-ability usage for learning more about deeper meanings of their world, including both material and spiritual ones.
Due to their deeper focus on self-enlightenment aspect on Aura ability, their own theory and perception on Aura usage are different compared to Remnant's Kingdoms' one.
self-enlightenment
[Society and Culture aspects]