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. In order to have better understanding on advanced aspect on Aura-ability usage and have better protective place for their own kin, they established

"Spirit-kingdom"

conflict with [Old four families]

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. Instead of treat Aura as their own energy which came from themselves and use said power as defensive barrier and strength-enhancer, [Spirit-folk] treat Aura energy as another independent sapient spiritual entities which have close bonding relationship with said user, and they call such independent sapient entities formed of spiritual energy as "Auric-spirit" (also known as "Auric-bondliar" or "Aurspirit"). Said spirit-summoning ability is typically granted through series of self-enlightenment training

conversion between materialized form and intangible invisible form

energy sensing

multifaceted-form-transition

remote vision via "Auric-spirit"

spirit-host embodiment (exterior armoring & complete energy-infused embodiment)

double-spirit combination

(descendant of 'four families':)

[Society and Culture aspects]