Alice is the existence that governs the Abyss. She usually appears in the form of a bloodied rabbit doll with big round eye, but the real form of the Will of the Abyss is Alice with white hair and clothing. It was thought that the Will of the Abyss wanted Oz and Alice to go back in the Abyss. The Will of the Abyss and Alice are somehow connected. She also has powers such as destroying Chains, switching between the Abyss and the outside world and changing the past.
It is later revealed that Alice and the Will of the Abyss are twins.
