|OCCUPATION||Pathogenic Cells Killer|
|ANIME DEBUT||Episode 1|
|MANGA DEBUT||Chapter 1|
U-2001 is a minor character in Cells at Work!.
He is first seen as one of the new neutrophils in the body after the last Pneumococcus is sneezed out. Later, he along with U-4989, U-2626, and U-2048 fights against the bacteria invading the body during a scrape wound.
He has extremely pale skin and hair like the other neutrophils. He wears the neutrophil uniform. He has black eyes and his hair appears to be in a buzz cut.