This evil demon in Sousei no Onmyouji is one of my favorite parts of the show.
She shows up, brings out her boombox, and starts singing and dancing to death metal. Some minor demons come out as backup dancers to support her.
Usually they just stare at her in shock, but this time our main characters decided to join her.
These scenes are great. Completely at odds with the show’s usual aesthetic. And somehow it fits perfectly.