Live action TV
Description
Banba is one of the resident otaku, or Amars, living in the retro apartment building Amamizukan. Her defining characteristic is her encyclopedic knowledge and passionate obsession with trains, making her a classic densha otaku. She can identify different train lines, models, and schedules with ease, often commenting on the most efficient railway route to any mentioned location. Physically, she is the smallest member of the group and is known for her very large, round afro hairstyle, which gives her a distinctive and somewhat androgynous appearance. Because of her short stature, boyish looks, and the use of the masculine personal pronoun ore, she is one of the residents most easily mistaken for a young boy.

Banba has a direct, blunt, and often sarcastic personality. She is pragmatic and not easily flustered, frequently acting as a voice of grounded, if cynical, reason among the more eccentric members of the household. Her primary motivation, besides her love for trains, is her intense craving for meat. This desire is so powerful that it overrides much of her social anxiety regarding the outside world and stylish people. She famously dubs the cross-dressing Kuranosuke as Meat because he consistently provides high-quality, luxurious beef, and she pesters him for it every time they meet. Her birthday, which falls on February 29, leads her to jokingly claim she is only eight years old, further contributing to her childlike and quirky persona.

Within the story, Banba serves as a core member of the Amars sisterhood at Amamizukan. Her role is largely that of a comedic supporting character whose obsessive train facts and demands for meat provide consistent humor. Her key relationships are with her fellow residents. She forms a comedic duo with the Three Kingdoms-obsessed Mayaya, and the two are often seen together, bickering or making obscure references to their respective hobbies. Banba also has a notable dynamic with Kuranosuke; while she and the others are initially wary of this fashionable outsider, her loyalty is quickly bought with food, and she becomes one of the more willing to interact with him, if only to secure more meat. She often orders him around and is unimpressed by his charm, viewing him primarily as a useful provider of resources.

Banba shows little to no character development over the course of the anime, as her personality and role remain static. She is consistently defined by her two primary traits: trains and meat. Her notable abilities include her vast, near-encyclopedic knowledge of Japanese rail systems. She also possesses a Meat Scope, a humorous ability to visually assess the quality and quantity of meat in a given situation. Despite living as a recluse who fears the stylish and struggles with social interaction, Banba is one of the more assertive members of the group when it comes to getting what she wants, particularly when food is involved.