Defend with all on the first turn, then alternate between using hypnosis, and pirouetting with Kris and defending with Susie and Ralsei until the 13th turn, which should be just after the attack with the red scythes. On the 13th turn, pirouette with Kris, defend with Susie and pacify with Ralsei.

Hypnosis is the option below check and pirouette is the option to the right of check in Kris's act menu. Pacify is immediately selectable after selecting the spell menu on Ralsei.