Najimi Osana, a student at Itan Private High School, thrives as a social virtuoso with a gender-fluid identity that defies categorization. Their name, Osana Najimi, playfully mirrors the Japanese term "osananajimi" (childhood friend), embodying their enduring bond with Tadano Hitohito and pivotal role in Komi Shouko’s journey. Born on April 1, they measure 149.86 cm tall and weigh 42.2 kg. Najimi’s aesthetic merges contrasts: a schoolgirl’s skirt clashes with a boys’ necktie, while lavender-tinted waves of short hair taper into spiked tips, occasionally adorned with playful, antenna-like strands. Beyond school, their wardrobe shifts fluidly between gendered and androgynous styles, a visual testament to their identity. A childhood encounter with Komi Shouko, whose silence shattered Najimi’s effortless friend-making streak, left them bedridden for a week. Even in high school, residual anxiety surfaces as visible tremors during eye contact. Yet witnessing Komi’s accidental kindness compelled Najimi to assist Tadano in befriending her, securing their place as Komi’s second confidant. Pronouns shift around Najimi like seasons—classmates alternate "he" and "she," while they casually employ "boku." Summer festivals see them in a masculine jinbei; pool days pair a feminine swimsuit with jean shorts. Gender-segregated spaces, from bathhouses to school trips, often exile them to neutral zones, subtly exposing societal rigidity. Despite academic apathy, Najimi’s innate intellect yields top grades. As class vice-president, they mastermind ventures like a Komi-centric maid café to exploit her popularity for profit. Their extroversion borders on supernatural, juggling seven simultaneous conversations. Pivotal moments include orchestrating group activities, mediating Komi’s social hurdles, and navigating isolation during a Kyoto trip—assigned to no group, seated alone, and barred from gendered baths. Yet their charisma endures, boasting a self-proclaimed six million friends. Trivia reveals quirks: a feline allergy, a rotating collection of 33 unique backpacks, and a running gag tying their omniscient knowledge to Brazil—a joke later literalized when an extra chapter depicts them journeying there. Family members remain absent from documented lore.