Demon Slayer is an exceptionally successful modern Shonen anime title. There are several reasons why this series is a cut ...

He later inverted this as Demon Slayer progressed by introducing Kyogai. He was a former member of the Muzan Twelve Kizuki, and was also the first three-dimensional demon in Demon Slayer.

The Twelve Kizuki from Demon Slayer was a rank given to demons Muzan hand-picked himself. Among them, the ranking was further divided into the Upper Moon and the Lower Moon based on the power level.