Quattuor Orbis is Viola's primary weapon in Soulcalibur V. It is a glowing magical orb that capable of creating waves of energy, as seen in Viola's Critical Edge. Quattuor Orbis has been by Viola's side since she could remember. However its origin is unknown, even to her. When Viola awoke in a ruined encampment deep in a forest, she was already holding the crystal ball close to herself. When wild wolves approached her, the orb suddenly shot out and killed them. This crystal ball one of the main methods which Viola uses to read fortunes. By peering into the orb, she observes symbols which tell her that particular individual's nature and fate. With this, she is able to see a person's soul, represented by a moon. This includes those whose souls are represented by a red moon.