Sachiko

The surgeon who is a colleague of Aoi Takamoto has a close relationship with Aoi, exchanging jokes with him. He sometimes calls Aoi “King of Surgeons” or “MonDoc” (short for Monster Doctor). He is also one of the few people who can decipher Aoi’s messy handwriting, and he will organize the reports so that they are readable and submit them in Aoi’s place.