Animism as a religion is most common in the far east, with slight variations depending on where it's practiced, animists believe that the world is governed by various spirits, rather than very distinct gods with their own teachings and dogma.
Animism places great importance in relations. The elderly are said to be more holy, for they are closer to death and joining the Spirits that the living worship. As such, younger people defer to their elders. These elders are usually in more senior positions, so while juniors defer to their seniors, this is often one and the same. The young are to respect their elders so that they protect them and bless them. The old are to respect and treat the young well, so that their descendants will continue to worship them and leave offerings for them, rather than let their souls be forgotten.
These "Forgotten Ones" are said to be people so wicked in life that their children and future descendants elected against honoring them in death. Animism doesn't make distinctions for peculiar spirits like Nyrellanism does, so Spectres, monsters, and fiends are all considered Forgotten Ones.
In Estarese, "Shokuromi" is a term for "soulless" people; ones that can't use magic. Basically people with Aer Cortex Deficiency Syndrome. They believe these people have been forsaken by the spirits and the universe, hence why they can't use magic. They're thought of as bad luck for friends and family.
It is historically a slur, but modern Estarese people have reclaimed it, using it as a term of endearment in their social circles.
The Estarese term for Forgotten Ones is "wagami," roughly translating to "evil spirit." It's believed that Shokuromi are their favorite hosts.