OVA
Description
Haruko Amaya is a central character in the OVA Maken-Ki! It's Summer! It's Swimsuits! It's Training Camp! She is a second-year student at Tenbi Academy, where she holds significant authority as the vice-president of the Student Council Security Division, the head of the Maken-Ki club, and the leader of the student dormitory. She is the childhood friend of the protagonist, Takeru Ooyama, and is considered the strongest female student at the academy.

In terms of appearance, Haruko is a tall and strikingly attractive young woman with a well-developed, curvaceous figure, noted to have an H-cup bust. She has long, dark purple hair that reaches past her waist, which she typically keeps tied up in a high ponytail with a red ribbon, framing her light blue eyes.

Haruko's personality is a blend of responsibility, kindness, and hidden vulnerability. She is known for being a principled and caring individual who adheres to a strong moral code, believing in justice and the rules of the academy. Despite her formidable power, she is surprisingly modest, often underestimating her own abilities and preferring peaceful resolutions to conflict whenever possible. However, she has a well-known tsundere character, particularly regarding her feelings for Takeru. While deeply in love with him since childhood, she struggles to express her true emotions, often masking them with jealousy and violent outbursts when he behaves immodestly or attracts the attention of other girls. Takeru affectionately calls her Haru-nee, highlighting their close, sisterly dynamic. She lives in a dormitory room with Takeru, Inaho Kushiya, and Kodama Himegami, a situation that frequently stirs her jealousy and creates comedic tension.

Haruko's primary motivation stems from her bond with Takeru. She is fiercely protective of him, a trait rooted in a childhood vow where he promised to protect her. This promise fuels her dedication to his safety, and she will risk herself without hesitation when he is in danger. Her internal conflict often revolves around balancing her duties as a leader and a pacifist with her personal desires, including her unspoken wish to secure Takeru's affection. Her role in the story involves acting as a powerful guardian and a stabilizing force among her peers, even as she navigates her own romantic frustrations.

Haruko is an exceptionally powerful Maken user. Her primary weapon is Murakumo, considered the most powerful of the eight legendary Maken in terms of destructive power, which allows her to manipulate photons. This blade is so formidable that it is typically sealed in a parallel dimension by her secondary Maken, Heaven's Gate, a chain-like weapon that can also restrain opponents. The seal on Murakumo is designed to break only against opponents of sufficient power, though Haruko's intense emotions can sometimes unlock its strength prematurely. Her overall combat ability is ranked at S-Rank, and she is known for powerful techniques such as Kusanagi, where the blade transforms into a massive pillar of light to obliterate her target. As the story progresses, she gains greater confidence in wielding Murakumo, learning to summon it fully unsheathed without fear.
Cast