Shingo Saito’s Yonagahime, or “Midnight Princess” for those in the anglosphere.
Put this in your friendly neighborhood dungeon, and I guarantee the players will have a hard time believing it isn’t going to come to life and do something terrible to them in their sleep.
Land of Nod 
Very creepy, thanks for posting this I will make good use of it at some point.
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“Midnight Princess” is a cool name. It has an anime-ish ring. 😉
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