The Ultimate Inventor. Miu is described as an oddball, having an overly confident, loud personality and a frighteningly sharp tongue. She considers herself a beautiful genius, and every time she opens her mouth she spews a parade of reckless vulgar remarks and insults, strongly putting pressure on others and looking down on them. However, Miu's arrogant personality seems to be only a mask that can drop fairly easily. This often happens when her festival of coarse language and dirty jokes get replied to or ignored. Then, her personality quickly changes into a timid weakling, who is terrified of other people being angry with her. Because of this, she has a charm similar to an innocent child. As an inventor, Miu is skilled but also an eccentric who treats her failed projects with the idea that "I transferred the rights to the company, so it's got nothing to do with me". She has made all kinds of amazing conveniences both inside and outside of the Killing Game, but only deems her inventions as a success when they help the user to perform a task while sleeping. She also has a habit to make very bizarre, seemingly pointless inventions that are sometimes very sexual in nature. Created to be the "naughtiest character in the series' history", Miu comes off as very perverted and openly says bizarre, obscene things during her arrogant moods, meaning almost constantly. Miu has a very cowardly and self-centered personality, immediately looking for excuses to be absent from the Class Trial after being reminded that she would be executed with everyone else if they reach the wrong conclusion. Also, despite her amazing inventive genius, she is rather dumb when it comes to other matters. Despite her timid personality, she genuinely believes her bragging, thinking she can change the world with her inventions and that she is truly important to humanity.