Firekeeper or flametender describes a specific ceremonial role, common in the religious practices of a variety of cultures.
A firekeeper or flametender tends the sacred fire in the manner specific to the religious traditions of that culture.
Similarly, those entrusted with tending this flame often held a sacred role in the culture.
A sacred fire is often a place for the offering of prayers, herbs, food, and sacrifices of artwork.
In the past world of no matches, and no easy ways of making fire under wet conditions, it was necessary for someone to always be present to keep the flames or red coals burning for long periods of time.