Her voice is dull and her face is flat, both holding little feeling. Mafuyu’s personality underneath her facade is considerably more cold and blunt. Her true self being lost a long time ago, she is desperately searching to find herself once again. To everyone else, Mafuyu is a 'good girl.' However, to herself and the other members of her unit, she is dispassionate, largely lacking in emotion and empathy. Others are not afraid to rely on her, and they often have high hopes for her, knowing that she has met expectations before and will continue to do so. She is difficult, arguably impossible, to anger, for any hesitation she shows that might portray disagreement or displeasure is immediately covered with a gentle smile. She is known to be kind, generous, and considerate, her words always polite and her voice soft and warm. Mafuyu is admired for her smarts, athleticism, and the humble sincerity she shows when she is praised for these talents. This section may contain spoilers from the story, please read at your own risk! Her casual outfit consists of a light blue sweater with a grey-and-white striped shirt underneath and beige bellbottoms. She wears a dark grey cardigan, the color being similar to that of her unit outfit, and her skirt is the same light grey as her shirt. Her regular school uniform is a lighter shade of grey, with a red butterfly ribbon. Her black shoes are heeled, as shown in her 3D model. The skirt grows longer at the back of the outfit. The skirt is long and grey, with two stripes of black near the bottom, and it is covered by two semi-transparent pieces of fabric. Her shirt collar is black, outlined in light grey, and her butterfly ribbon consists of two ribbons, one black and one blue, tied at the middle. Mafuyu’s unit outfit is a dark grey stylized school uniform, with long sleeves that fade to black and are tipped with grey frills. This happens most often when the 25-ji, Nightcord de. While Mafuyu’s eyes are usually wide and bright, they will occasionally lose all light and go dead when she is honest with her feelings. Her ponytail is held in an orange hair tie. She has an ahoge that swoops to the right above her fringe, and her face is framed by short, curly strands on each side. Mafuyu’s fringe is fairly long as well, with the middle section falling past her eyes.

Her ponytail may not be considered messy, but Mafuyu's hair does not seem to be combed. Her hair is curly, long, and usually kept up in a ponytail that tends to fall over her right shoulder. Mafuyu has dark purple hair with eyes that fade from dark purple to sky blue in a gradient. She is also in class 2-B with no known characters at school. She is a member of the archery club with Shizuku. Aside from her lost sense of self, she lost the ability to properly taste and enjoy food in middle school. Her parents, who have pushed her to do what they want and think is the best for Mafuyu instead of letting her pursue her own dreams, are largely to blame for her current affliction. She no longer remembers what she likes and has difficulty even recognizing her own emotions. As Mafuyu continued to conform to the expectations of her parents and her peers, she gradually lost all sense of self-identity, becoming the empty shell of the person she is now. However, her parents pressured her to be a doctor instead, and Mafuyu complied, wanting to make them happy. In middle school, she aspired to be a future nurse.

Mafuyu once had hobbies and interests of her own. However, in reality she is heavily burdened and pressured by her peers' and her parents' (especially her mother's) expectations of her. She is said to excel in both academics and sports hence, people often set high standards for her to excel in everything, which she does without fail.

She constantly earns good grades and is the representative of her class. Mafuyu is an honor student and the only one in her circle who regularly attends school during the day.

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