Band Together! Quartet.Roswaal reveals that Destroyer has a giant headband, and is considered another participant in the cavalry battle. Kazuma tries to use his Steal skill on both Destroyer and the teacher's headband, but to no avail, with Subaru remarking that he wouldn't easily be able to use a "one-shot" ability on a "final boss" character. Class 1's team decides to attack the teachers, leaving Class 2's team to combine their abilities to get Tanya on top of Destroyer's head...