the Berasit Hebrew Dictionary

שרפימ

'serepim' is the plural personification of serep (“roast”) so it appears to mean “Roasting People”, possibly a specialized BBQ chef or “grillmaster”.

This word has traditionally been mistranslated as some kind of mystical and ethereal being, and typically pronounced as Sareph. There is no indication within the text that the serepim are non-corporeal or possess superhuman power.