Doll's Core

"Heart"

The heart of a Doll. It is the center and source of a Doll's power, gaining even more power through the consumption of human souls.

Cores have multiple appearances and are made of various materials, such as wood, stone, crystal, flesh, metal, etc. They usually have the appearance of a human heart. Despite looking easily perishable, cores are indestructible. The materials it is made up of symbolize the Doll it belongs to.

Cores are originally human hearts that have been dried up of blood and mutated to give "life" to Dolls. They can only be destroyed with a Soul Art or be eaten, the former applies only to the Death Doll. Cores are the center of a Doll's power. Through consumption of human souls, the core gains more power and the Doll becomes even stronger as a result.