Honestly, this is low key kind of horror-y. Being completely trapped in your body and unable to control it completely is nightmare shit. In addition, there is the trauma of being forced to kill someone you care for. They're basically sentient living dolls with no control. The prince probably also getting sexually molested by the saintess as all this is happening. If the writing wasn't comedic, this would be horror
MY HEART. I'M CRYING. YOU'RE ALREADY HER OTHER DADDY