OVA
Description
Haruka endured a troubled childhood under an obsessive mother who treated her like a confined doll and a corrupt, adulterous father who worked as a doctor. This environment drove her to the brink of burning down the family home until Rin intervened, becoming her mentor in puppetry. Haruka used these skills to expose her father's corruption, forcing his public admission of guilt. She later enrolled at Hebijo Clandestine Girls' Academy, swiftly ascending to its Elite Class as a third-year student and becoming one of its founding members.

Her personality blends sophistication with a distinct pleasure in toying with opponents, exhibiting both sadistic and masochistic traits. She engages in mind games and dominatrix-like behavior, particularly targeting weaker individuals like Hibari, though much of her provocative speech serves as defensive bluster. Despite her intimidating exterior and enjoyment of others' discomfort, she demonstrates genuine care and loyalty towards her teammates, especially within Hebijo's Elite Class. She operates in moral ambiguity, never fully committing to either good or evil.

In combat, Haruka employs chemicals and puppetry. She wears a lab coat lined with vials of hazardous substances: paralyzing agents, experimental growth serums, and drugs inducing uncontrollable dancing. Her arsenal also includes seeds that grow wooden puppets, though their utility is hampered by slow growth. This unconventional approach reflects her scientific ingenuity and willingness to experiment mid-battle.

During the OVA *Estival Versus – Festival Eve Full of Swimsuits*, Haruka's chemical expertise takes center stage. When Yomi overeats and cannot compete in a water cavalry battle, Haruka searches her bag for solutions, revealing drugs like a paralytic, a samba-inducing compound, and the experimental growth serum. Though none help Yomi, the growth serum becomes plot-relevant when Ryōna accidentally drinks it, transforming into a giant. Haruka devises a plan to reverse the effect by having others attack Ryōna to induce sweating, which succeeds after an explosive climax. Haruka remains a non-combatant in the cavalry battle due to lacking a remedy for Yomi.

Her relationships reveal a protective side beneath the eccentricity. She warmly welcomes Hibari when the latter temporarily joins Hebijo, explicitly dismissing earlier threats to turn her into a doll and emphasizing she would never harm a teammate. Interactions with characters like Ikaruga show shared frustrations over their respective leaders' recklessness, fostering mutual understanding. While she relentlessly pursues Hikage to test her drugs, her actions stem from warped amusement rather than malice.

Haruka occasionally breaks the fourth wall, referencing game mechanics like the Dressing Room's tilt controls and humorously recommending players explore it after completing story modes—a nod to her childhood experiences of being dressed as a doll. She stands 169 cm (5'7") tall with measurements of 99-55-88 cm (bust-waist-hips), possessing light brown hair, green eyes, and typically wears an outfit resembling lingerie paired with a white lab coat.