It is said that they are female demons accepted by Chen Ching-ku after she returned from the mountains where she studied Taoism. Or it is said they are palace ladies swallowed by a white snake who became acolytes of Chen after she rescued them, helping to raise and look after small children.
傳說是陳靖姑學道下山時所收女妖；或說是被白蛇吞噬的宮女，在經陳靖姑解救後拜為門下，幫助祂養育照顧小孩兒。