U-4989

Like other neutrophils, he wears an all-white neutrophil uniform and has white skin and white hair. His eyes are slightly larger than those of other neutrophils and are also black. He has short, fluffy hair that reaches the tips of his ears with parted bangs. His uniform is tight-fitting, so the outline of his muscles is clearly visible, he has a white shirt with white belts for his guns, white jeans with many pockets, and smart white shoes, as well as a white cap with his number "U-4989" embroidered on it. He always carries a weapon with him, and the guy always has at least a few knives.

U-4989, though a skilled fighter, appears naive compared to his comrades. He is known for crafting improvised weapons, and once forgot to use his L-Selectin on a cut, nearly falling to his death. He often appears bloodthirsty, but is actually a kind and sensitive cell who deeply loves his comrades. He constantly shows concern for the well-being of U-0869. The cell looks very strange and scary, especially when it comes to eliminating bacteria or viruses. But in reality, it is very affectionate, gentle, and friendly.

It was created by stem cells, which give rise to other blood cells. This process is called hematopoiesis and occurs in the red bone marrow. There, the fate of cells and their future is determined. He is a neutrophil, working in the Neutrophil Cell Department, and a close friend of U-1146, along with U-2001, U-2626, and U-2048. His purpose as a neutrophil is to destroy bacteria invading the body. Previously, when he was a myelocyte - a granular leukocyte precursor cell, and was learning the future from U-0869.

A macrophage is a cell capable of actively engulfing and digesting bacteria, dead cell debris, and other foreign or toxic particles. It is present in virtually every organ and tissue. Macrophages are charming young ladies who love to drink tea, keep order by cleaning up the bodies of the dead, act as nurses for tiny blood cells, and also brandish huge axes and clubs in battle. Although macrophages are usually female, U-0869, a male who spent many years cultivating numerous cells, was one of the few of the highest quality and suitable for any job. He wears light-colored clothing and is usually business casual. He spends most of his time in the spinal cord, cultivating cells for their future work. One of his protégés was U-4989, along with many others. Many other cells often made fun of U-0869 because he was assigned to macrophages—they usually only house women—and he himself was too fragile and pretty for a man. Despite this, he received a lot of female attention.