Murasaki, a second-year enrolled at Hebijo Clandestine Girls' Academy, holds the unique distinction of being its first and only truant, never attending classes. She is the younger sister of Imu, born into a long lineage of evil shinobi who wield the dark magical power known as the Root of Calamity. Her appearance features ankle-length violet hair secured by a black ribbon above her bangs, which frequently casts shadows over her purple eyes, accentuating a perpetually sad expression. She typically wears a long black dress with gray trimmings and possesses notably large physical proportions. Murasaki lives in extreme social withdrawal, isolating herself almost entirely in her room with her stuffed bear, Bebeby. She communicates solely through Bebeby using ventriloquism, treating it as her trusted confidant. Her personality is fragile, soft-spoken, and pacifistic under normal conditions, yet underpinned by a deep cynicism that rejects concepts like friendship and asserts all humans are inherently lonely. Fear or anger triggers the Root of Calamity, causing a drastic shift: her voice deepens, homicidal rage surfaces, and her combat prowess surges dramatically. This power stems from spiritual strength fused with intense negative emotions. Its first known manifestation occurred in childhood; pressured by her father to train as a shinobi, Murasaki accidentally injured Imu while defending Bebeby. Overwhelming guilt from this incident cemented her isolation. Her parents later deceived her into killing a Hebijo exam representative, securing her enrollment. She then threatened to unleash the Root of Calamity against them if forced to attend, solidifying her shut-in existence. This reclusive life honed her olfactory senses, enabling her to discern personality traits, social status, and intentions through scent alone. Murasaki's development begins when Imu coerces her into Hebijo's conflicts by threatening Bebeby. Initially resistant, Murasaki agrees only after defeating Imu in a fight, hoping to earn forgiveness for the childhood incident. During missions, she remains distrustful, notably detecting deception in transfer students Ryōbi and Ryōna via scent. Key interactions challenge her worldview. After defeating Yomi, she overhears Yomi and Ikaruga discussing friendship across social backgrounds, prompting Murasaki to question her cynicism. Her resolve crystallizes upon learning Ryōbi and Ryōna plan to assassinate Imu and Miyabi. Declaring her power exists to protect Imu, she confronts Ryōna. Though defeated, she intercepts a bullet aimed at Miyabi to save Imu, demonstrating her commitment to reconciliation. This act signifies her growth: while still reclusive, she begins to acknowledge the potential for human connection and the value of using her power protectively rather than destructively.