fire walker:
(also in written in one word: ‘firewalker’; plural: ‘fire walkers‘)

a fire walker on a bed of hot coal
a person who walks barefoot on burning coals, hot stones, ashes, etc. as an act of faith, or in the present, to disprove the myth of super natural powers a fire walker is supposed to have, believed by some people in some religions;
a person/an entertainer who performs an entertainment or music programme,

a myth-buster fire walker demonstrating the feat of walking on hot coals bare-foot
Charles is a professional fire walker and fire eater who does the feats of swallowing fire and walking on hot coals in entertainment shows for money.
In most countries, especially in Asian countries, some of the temple priests are professional fire walkers who perform the feat of walking on hot coals as a part of the religious rituals.
Though some religious people boast that fire walkers are superhuman and fire walking is a god’s gift, there are many ordinary people who walk on fire just for fun.
In Bulgaria, a European country, there are female fire walkers in some village who preserve and perform a special ritual of dancing on hot coals as a part of a ritual that is believed to have been in practice even before the Christian era!
