Mizuha Miyama presides over Kitanohashi High School’s manga club, whose room borders the magic club’s space. She harbors a perpetual rivalry with the magic club, relentlessly campaigning to dismantle it and annex its territory. Her contentious dynamic with magic club president Takeo Takakura traces back to their childhood, marked by her habitual teasing and pranks, which escalate in high school through calculated confrontations where she leverages her stature, notably her imposing bust, to unsettle him.

Beneath her combative demeanor simmers concealed romantic feelings for Takeo, masked beneath a veneer of hostility and dominance. Her crusade against the magic club and insistence on overpowering Takeo arise from this internal clash between pride and longing. Though revered by her manga club subordinates for her unwavering confidence, her dealings with Takeo oscillate between sharp provocation and poorly veiled tenderness, which he routinely overlooks.

Her portrayal remains static across official narratives, sustaining her role as a rival driven by covert vulnerability rather than genuine spite. The push-pull between her and Takeo lingers in a fragile balance between clashing egos and buried affections, untouched by narrative progression or explicit closure.