White Blood Cell, also known as U-1146, is a central character in 'Hataraku Saibou' (Cells at Work!). He represents the neutrophil, a type of white blood cell, whose primary role is to protect the human body from infections by attacking and eliminating pathogens. U-1146 is depicted as a diligent and relentless warrior, often seen patrolling the bloodstream and tissues, ready to combat any invading bacteria or viruses. Despite his fierce demeanor in battle, he possesses a kind-hearted and caring nature, particularly towards his fellow cells, reflecting the duality of his role in maintaining the body’s health.