Shin Megami Tensei: Digital Devil Saga

Digital Devil Saga follows the Embryon, a tribe who fight against six other tribes in a digital world called the Junkyard. After being infected with a demon virus that grants them demonic powers, the Embryon must fight with and devour the other tribes to ascend to "Nirvana". During the conflict, they shelter a woman named Sera, who has the power to calm their demonic powers.