The dual purpose of the mannequins replacing the Witch's daughters in Scarlet Hollow is so clever.
I really like how the game uses the players emotions to urge them towards certain paths and using faceless human-like objects to try to get the player to agree with the Witch, that one life is not worth the lives of hundreds, or thousands, or millions, is really well-executed. It's easy to make that choice when the numbers are simply that: numbers. You have no emotional ties to this mannequin. Maybe the Witch does, maybe there's more to this story, but you're the one making this decision. Logic sides with your daughters' sacrifice.
The mannequins can also represent the Witch's memories. It's been so long, she doesn't remember the face of her first daughter, just her pleas leading to her sacrifice. She doesn't remember her second daughter, just her defiance leading to the Witch raising her daughters to be more willing to die. She barely remembers the person the last daughter she sacrificed was. She still remembers her daughter's humanity, something she has long forgotten in her other daughters. This one isn't a statistic, an effect. Not yet. This is where the player should be faced with doubt, or guilt. Faced with the humanity of this daughter, is it really the right choice to sacrifice her? You could justify the others, they were just statistics. So why are the numbers harder to justify with this one?