OVA
Description
Maihime Shirayuki is a main character in the narrative, serving as a member of the Earth Defense Force's Saitama branch under the code name ExeWhite. She is a high school student attending the Saotome Girls' Academy and lives in the branch's dormitory alongside her teammates.

In terms of appearance, Maihime has long, soft pink hair that is usually styled with her bangs covering her left eye. She is recognized as the most curvaceous member of the female cast, with her body measurements listed as B92, W62, H90. Her HxEROS device takes the form of a choker worn around her neck.

Maihime's personality is defined by her gentle, kind-hearted, and easygoing nature. She is notably clumsy, unathletic, and often described as air-headed or a bit slow, which frequently leads to her making mistakes in daily life. Despite these traits, she is considered by her teammate Retto Enjō to be the most level-headed and sensible member of the Saitama unit, often reacting to the absurd situations around her in the most normal way. She has a highly sensitive body, making her very reactive to physical stimuli, and she often misinterprets conversations she overhears, leading to comical misunderstandings. Maihime has a strong maternal instinct and a deep fondness for cute things, which is a significant aspect of her character.

Maihime’s primary motivation stems from a lack of self-confidence. She worries about not possessing any special strengths or talents that set her apart from her teammates, feeling anxious about her place on the team due to her perceived inadequacies in combat skill. Despite these insecurities, she remains steadfast in her commitment to support her teammates and protect Earth's H-energy from the alien threat known as Kiseichuu.

Her role in the story is that of a support-oriented fighter and the nurturing heart of the team. She manages most of the household chores in the dormitory, including taking care of the robot vacuum, Runba, who often comically harasses her more than the others. She provides a sense of warmth and normalcy to the group, acting as a stabilizing presence despite her own clumsiness.

Key relationships define her interactions. She initially feared Chacha, a Kiseichuu princess allied with the team, but soon grew to adore her cuteness, giving her the nickname "Himeme". She shares a close bond with her teammates, and when the protagonist Retto Enjō is temporarily transformed into a child, her maternal side emerges strongly as she becomes very affectionate towards him. Her friendship with her schoolmate Chiya is also notable, as Chiya’s confidence in her helps Maihime find her own strength in a critical moment.

Maihime experiences notable character development, primarily centered on overcoming her lack of self-confidence. In a crucial mission at her all-girls school, she confronts a powerful Kiseichuu despite her initial fears. Drawing on the belief that her best friend has in her, she summons the confidence to defeat the enemy, beginning to realize her true value to the HxEROS team. This event helps her gradually reinforce her understanding of her latent potential. Underlying this is the fact that she possesses an overwhelming amount of H-energy that far exceeds others, forming the core of her combat power, even though she is initially unaware of her true potential.

Her notable abilities are sound-based attacks channeled through her choker device. She specializes in mid-to-long-range combat, using techniques such as the Lamaze Cannon, Bel Canto Cannon, and Pulse Echo Cannon. Her measured H-energy value is 40.5 MJ, which is the lowest recorded among the Saitama branch members. However, her attacks are highly effective for control and defense at a distance, allowing her to provide crucial support for her team.
Cast