Mast Cell

Mast Cell (マスト細胞, Masuto Saibō) is a minor character in ''Cells at Work! ''

She is a white blood cell, specifically a Mast Cell (mastocyte or labrocyte). As a part of the immune system, she releases chemicals such as histamines and leukotrienes as a stimulus to excess production of IgE (Immunoglobulin E, an antibody produced by B Cells).

Appearance
She is a serene-looking cell who has black hair that passes her shoulders and a pair of brown eyes.

Personality
Despite of her appearance she can be very fierce if she is unhappy, especially when her work is unappreciated. She is sometimes insecure about herself as she is afraid to cause trouble to everyone whenever she overdo her job. She gets very angry when people call her "Fat Cell", showcasing her insercurities, as seen in Episode 5 when B Cell blames her for all the destruction and calls her "Fat Cell". She, in return, yells that the B in his name must stand for Bonehead and after some back and forth arguing, they fight each other.