Gyutaro (AU schoolboy)

Ume (whose surname is Shabana, like her brother's) is a popular second-year high school student and is considered one of the three most beautiful girls in the country. Ume is renowned for her beauty and popularity at school. Her personality is described as easily influenced, leading her to adopt traits of those she trusts, especially her brother. She tends to be loud and demanding, sometimes yelling at those around her. She maintains a strong emotional and other dependence on her older brother, Gyutaro. Like Gyutaro, Ume has an unusual friendship with Shinobu Kocho. She is often seen arguing with Shinobu, but deep down they get along well. Her role is akin to that of a school "beauty queen" with a sometimes spoiled attitude, but in a lighthearted and comedic context. She is a tall, curvy young woman with pale skin, lime green eyes, and long eyelashes.
Her hair is long, white, and well-groomed, often styled neatly or in a fluffy ponytail.
She usually wears the school uniform, which in some depictions consists of a white blouse, tie and skirt, often with accessories such as white stockings and black shoes.

Gyutaro is likely a reserved, solitary, and short-tempered student, due to his tragic past and the way he feels judged by his appearance as the stereotypical Japanese delinquent, which defines his aesthetic and role. He maintains a fiercely protective older brother instinct toward Ume. He is shown to look after her, making sure she gets what she wants, such as storing an antique music box in a shop until she can pay for it. He forms an unusual friendship with Shinobu Kocho in this AU, sharing the common interest of wanting the happiness of their respective younger sisters. It is also mentioned that he and Ume arrive at school on motorcycles and call the main characters "nerds," as depicted in a comic strip in the manga. He retains his black hair with lime green tips and his pale skin with dark spots, although the facial markings may be absent or less pronounced.
He wears casual clothes or a modified school uniform, often in a scruffy style that matches his delinquent image.