"The doll is hard to the touch."
Straw Doll (わら人形 wara ningyō ) is an item in Resident Evil 7: Biohazard.
The Straw Doll is meant to be used on the stove to burn it and reveal the Dummy Finger in both the main game and during "Happy Birthday" video tape. It is required to be used during the tape to reach the end of the sequence but it is not necessary to pick up or use during the main game.
The Straw Doll is located in a locked box in the room with the cake.