Hibiki first appears when the Valkyries attack Kisara Nanjō for treason against Ragnarok. It is during Kisara's attempt to take an injured cat to the vet that Hibiki emerges and prevents her from fleeing by using her flail to tie her up. The Valkyries proceed to beat Kisara until Miu Fūrinji and Kenichi Shirahama arrive. Miu runs away and brings the cat to the vet while Kenichi stays behind to help Kisara. Kenichi refuses to fight the Valkyries and instead flees with Kisara in tow. Hibiki, furious at Kenichi for being "sexist" ruthlessly pursues him with the others. Just when they think they have the two cornered, Shigure Kosaka rescues them by cutting all of the Valkyries clothes off and destroys their weapons, ridiculing them for their bad form. They vow to get revenge on Kenichi as they