Kurumi Isoshima, childhood friend of Takeshi Nanase, forged a fabricated romantic bond with him to shield herself from relentless male attention after a traumatic middle school stalker incident. This ordeal triggered severe androphobia, temporarily isolating her at home. Their pact included dissolving the relationship should genuine feelings for others arise, yet her own affection for Takeshi deepened quietly over time.

Her striking features include cascading thigh-length blonde hair fastened by a dark purple bow, with mint-green anime eyes shifting to pale-blue in manga renditions. Renowned beauty drew persistent admirers from youth, fueling her fear of men—a phobia excluding Takeshi, whom she trusts unconditionally, and Takao Oigami, whose occasional aid earned guarded reliance.

Kurumi wields Transformation magic, manipulating physical forms to alter her appearance, age, or gender. Early unintentional manifestations, like breast expansion, matured into full-body mimicry, such as impersonating Takeshi. Her Aspect—a lipstick glowing pink when activated—demands a kiss to trigger transformations. Supplemental curative magic accelerates healing but cannot fully mend injuries.

Initially jealous of Mui Aiba due to Takeshi’s growing closeness, Kurumi eventually bridged rivalry into tentative friendship. Unaware of Gekkou Nanase’s obsessive fixation until his hostility erupted, she faced abduction by him, testing her resilience while underscoring loyalty to Takeshi and resolve to protect others. Kazumi Ida’s teasing antics often irked her, yet their clashes never escalated.

Magic evolution mirrored inner growth: superficial alterations gave way to strategic mimicry, reflecting heightened control. Her name, blending “walnut” (kurumi) with “fifty” (iso) and “island” (shima), contrasts fragility with adaptability. From trauma-bound reliance on pretense to a magician embracing self-assurance, her arc weaves trust and self-acceptance into a narrative of quiet metamorphosis.