As the Sentinels are informed of their mission of protecting the heroes, Mebuki tries to question Taisha about why her memories of the fire offering were altered, but gets few answers. Following a survey mission, Mebuki encounters Karin, who had become distraught after just learning about Yuna's curse. As Karin's worries clash with Mebuki's own views, the two spend the entire night fighting each other, ultimately encouraging each other to make things work. On the day of the Shinkon ceremony, the Sentinels are tasked with making use of a powerful cannon to help the heroes hold off the enemy until the ceremony is complete.