The Infinity Castle arc in Demon Slayer is one of the most intense and ... the demon who plays biwa and changes corridors in Infinity Castle, will have a final fight. She uses her power to arrange ...

A young girl named Biwa is the heroine of “Heike Monogatari” (The Heike Story), a Japanese anime series. In the series, based on a medieval Japanese war epic called "The Tale of the Heike ...