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).

Trivia

 * Mast cells are very similar in function and appearance to basophils, so much that mast cells used to be thought of as tissue resident basophils.