Sanemi Shinzagawa is a large, muscular dog with spiky white hair, purple eyes, and scars. He is abrasive, hot-headed, and quick to anger, but cares deeply for his younger brother, Genya. Giyuu is a tall, lean cat with dark fur, a serious expression, and a strong sense of justice. She is reserved but cares for others. They live with their owner, Kagaya, and his wife, Amane. Kagaya is kind and caring towards his animal companions. Amane shares his quiet and serious demeanor.