I hated all of the characters. SPOILER ALERT:
The dad is a horrible father who forced his girlfriend onto his kids without even properly introducing them. He didn't seem to care how strange it would be for his kids to have a "New mom" when their mom just passed away.
Grace was a psychopath but I probably liked her the most. She was the least inherently evil.
The kids were horrible to pull a prank like that, making Grace believe she was dead and they were in purgatory.
The film itself was a sloooooow burn, which I can appreciate, but it just wasn't done well. There was a lot of repetition and I feel like more character development could have been included. Like yeah, Grace was in a cult where everyone killed themselves. That's literally all we know about her. Cinematography was mid. I did like how the doll house was used for the kids' plan.