Miu Iruma is called the Ultimate Inventor.

Miu is described as an oddball, having an overly confident, loud personality and a frighteningly sharp tongue. 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 which can drop fairly easily. This often happens when her festival of coarse language and dirty jokes actually get replied or ignored. Then, her personality quickly changes into a timid weakling, who is terrified of other people being angry with her. Miu appears quite perverted and openly says bizarre, obscene things during her arrogant mood. Despite her usual arrogant behavior, she seems very uncomfortable if other people actually act very submissive towards her. Miu has a very cowardly and self-centered personality.

Miu has two main personalities that she slips into. One being bragging and vulgar (The second and third lines), and the other being timid and embarrassed(The first line). She has around a medium range for a female, possibly higher, and possibly lower. Her English voice is a pretty good indicator, but feel free to put your own spin on it.

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