Sumika Fujimiya is a young woman with shoulder-length black hair often depicted with subtle purple hues, brown eyes, and a statuesque frame accentuated by her long legs and prominent bust. Her wardrobe leans toward conservative cuts in muted tones like mauve and pink, though she once voiced discomfort when a childhood photo of her in a one-piece swimsuit was deemed revealing. As a child, her appearance starkly contrasted her current self—sporting boyish features, beady eyes, and exaggerated expressions she now finds mortifying after revisiting suppressed memories via magic. In elementary school, Sumika swung between bullying peers—including her childhood friend Takafumi Takaoka—and shielding him from others’ aggression. Takafumi recalls their clashes with unexpected fondness, while Sumika clings to an idealized self-image as a delicate, well-mannered girl, a fiction shattered by shared recollections of her past. Maturity tempered her volatility into calm pragmatism, positioning her as the voice of reason countering Takafumi and Yousuke Shibazaki’s antics, though she gradually softens to their chaotic energy. Her bond with Takafumi anchors her arc, defined by a decades-long unrequited love. She persistently pursues him through bold gestures and quiet signals, yet he misreads her romantic overtures as platonic camaraderie, prompting her to humorously speculate about his sexuality. Privately, she harbors a sly curiosity toward adult content, once urging Yousuke to share uncensored memories of intimate encounters. Forced to confront her history through memory magic, Sumika grapples with shame over her former bullying persona while striving to redefine herself. Despite this, she retains sharp practicality, balancing compassion with shrewd pragmatism—evident in how she navigates Yousuke’s alien worldview. Her protective loyalty surfaces unexpectedly, from defending Takafumi during childhood scuffles to mediating his friend’s clash with modern norms. Her name fuses “clear/pure” and “summer,” with the surname “wisteria temple.” Secondary material hints at potential bisexuality through attractions to male and female figures. Beyond romance, her narrative threads explore her role in deciphering Yousuke’s supernatural encounters, bridging his otherworldly perspective with contemporary life through equal parts skepticism and dedication.