When Hime has to introduce herself to her class, every student's eyes are shaded while a rather disturbing music plays. It really gives off the sense of anxiety that Hime is feeling in that moment.
The Pretty Cure Graveyard is basically a spine-chilling display of every single defeated Pretty Cure. Phantom the Pretty Cure Hunter did all of this as a show of his sheer power...multiple times.
Episode 32 has a good part of the battle with Namakelder completely without music, with only the sounds being audible. The colors are also very faded, almost grey. All this give a sense of uneasiness.
