Banba sports short, tightly coiled curls that shape a natural afro, obscuring her eyes entirely. Her signature attire—a black-and-white striped shirt, forest-green jeans, and vibrant blue sneakers—adds a striking contrast to her lively presence. As an Amar, she shares the group’s trademark fervor for singular fixations, with hers fixated unwaveringly on trains. She recognizes locomotive models by their rumble alone, recites timetables flawlessly, and wields the "Banba Scope," an uncanny skill to evaluate meat quality at a glance. Reserved yet sharp-tongued, Banba navigates life with dry humor and calm detachment. Though she bonds with every Amar, her camaraderie with Mayaya runs deepest: their days blur into games, shared hobbies, and impassioned exchanges about their obsessions. A leap-year birthdate marks her calendar with just eight celebrated birthdays, a peculiar trait that underscores her uniqueness even among her eccentric peers.