|SPECIES||Red Blood Cell|
|ANIME DEBUT||Episode 2|
|MANGA DEBUT||Chapter 4|
YE400 is a minor character in Cells at Work!
He is a red blood cell whose main task is to deliver oxygen, carbon dioxide and nutrients all over the body like the rest of his kind.
He is an average sized red blood cell with short brown hair. He wears the red blood cell uniform.
He is among the many blood cells that is used to stop the blood loss when there is a scrape wound.
As a red blood cell, he is a worker that is unable to protect himself. Therefore, his job is to only transport goods.
- Reversible Jacket: All red blood cells wear a reversible jacket that helps them indicate their speed when moving around in either veins or arteries. The jacket has extendable sleeves and zips up for colder weather.