It is only when a demon has intruded into the humans' domain that "The Demon Slayer" shows her true face. Brandishing her sword steeped in a magic liqueur, her extermination of the evil ones begins. The number matters not, any who tries to break free of their realm will find the supernatural shrine maiden assuredly bars their path. It is as if Kagura is impervious to their fangs and claws. She is indeed the great upholder of that boundary.
See Demons' Waltz Kagura.
Kagura is a japanese feminine name of Old Japanese origin; the meaning is "place of the gods", but it is written with characters which mean "music of the gods". Originally a compound of kamu "spirit, god" and kura "seat", later kura changes to gura ("music"). The original compound referred to the place used to call down the kami ("spirits and gods") to earth, when a miko ("shrine maiden") would act as a medium for the kami. Over time, the term came to refer to the music and dance of the ceremony.
Kagura ("god-entertainment") is a Japanese word referring to a specific type of Shinto theatrical dance; simply sacred dancing and music performed at Shintō ceremonies at shrine, often by miko, to honor Shintō spirits and gods. Kagura, whether it is performed in the sacred prencints of the Imperial Palace in Tokyo or in some small village shrine, always signifies a musical performance intended as an offering and an entertainment to the ancient gods of Japan.