Maria Mizuse

An attractive young woman with peach-colored hair and emerald green eyes, her hair is tied with black ribbon into shoulder-length twintails, and she has straight bangs. She wears a black blazer with an opening at her chest, underneath the black blazer she wears a white dress shirt, black mini skirt and thigh-length black thighs.

Despite the traditionally innocent and shy facade she is able present, Maria Mizuse undeniably harbors traces of a very twisted personality lurking beneath the surface. Such revelations hardly come as a surprise for an agent occupying a position of authority within the "Tomodachi Game"'s management, one that has seen the anguish, demise and torment of countless other students as per her job. Consequently, it is not unreasonable to suggest that Maria Mizuse displays a certain degree of emotional detachment and lack of empathy one of the instances of which occurs in episode 10, where her blatant disappointment in Yuuchi becomes evident following his apparent defeat, his demeanor seemingly crumbling and fracturing before her very eyes as a result of his earlier scheme to feign failure makes her lose interest and even mildly disgusted. Though Yuuchi had actually managed to outsmart her and it was all part of his plan, we get to see Maria Mizuse fall for it and switch sides soon after in order to betray Yuuchi. As clearly demonstrated in the episode, her mere reason for making such a cruel decision was simply to witness his devastated mental state and derive satisfaction from his heightened distress, increasing the probability of her possessing sadistic tendencies. That interpretation would certainly align with the mild disgust she had performed at the sight of weakness from Yuuchi for the sake of his scheme. The motives driving her involvement in the"Tomodachi Game"'s management, as well as the origins of her sadistic tendencies, remain undisclosed, much like her background and the background of other management agents. Nevertheless, this does not deter speculations, as there exists a plausible rationale as to why she would adhere to such actions: perhaps she is in great hunger for excitement, hinted at by the genius and leader of team K when he remarked how Maria Mizuse was an easily bored person and if she were to switch sides, she would have more fun with him instead. Those devoid of empathy frequently struggle to derive excitement or engagement from routine daily pursuits, after all, compelling them to seek extremes in order to experience vitality. At last, her acting skills are commendable even though she has her flaws (as in other characters can read through her mask shown in the case of the so-called genuis from team K and Yuuichi)

In conclusion, Maria Mizuse is a very complex character that still remains a mystery, and we are yet to learn about her true motives or hidden background.

(https://tomodachi-game.fandom.com/wiki/Maria_Mizuse)