Mako is a young woman with blue eyes and short gray-brown hair, with a fringe which seems to be parted in the middle to reveal her face. She is always seen wearing the standard Operator uniform.
Mako usually plays the role of a "Big Sister" in her unit.
- She likes crepes and horror movies, the latter of which relates to her given name, which looks similar to the word "demon child" (魔子).
- When the rest of her unit comes back from the outside, Mako would be seen watching horror movies in the dark while laughing to herself.
- By this point, Okudera and Koarai are already used to it, but Azuma gets a fright every single time.