Spiritualist
From BDSM Wiki
A Spiritualist is an umbrella term for someone that works in some sacred, supernal, or other non-material manner.
A spiritualist could be someone that is the authority in a D/s dynamic, such as a priest or priestess that leads others spiritually, or an s-type such as a worshiper of a d-type regarded as a deity (possibly being an alpha slave that leads the other slaves spiritually), or may operate in a neutral, monk-like capacity, simply being and offering wisdom to those that would ask.