Osana Najimi

Osana Najimi is one of the main characters of Komi Can't Communicate. Osana's gender is unknown, but they have been friends with Tadano since middle school. Long knowing them as a boy, it is to the latter's surprise that the former now dresses in a girls' uniform, albeit with a boy's tie, as they both advanced to the Itan High School. Najimi's gender is never confirmed, and they are frequently referred to with gendered pronouns, although it is implied that Najimi is genderless. Najimi regularly switches from saying they're a boy or a girl and laughing that anyone ever thought otherwise, though Tadano connects this more with what he describes as pathological dishonesty. They are the "ultimate" childhood friend, as everyone in the school has known them since childhood, due to their family's frequent moving during their childhood. Najimi is depicted as having immense capability in conversing and befriending others as a result of their childhood moving, but was hampered when introduced to Komi by Tadano, as their unsuccessful childhood attempt to befriend Komi left them with psychological trauma. Their name is a play on words; osananajimi (幼馴染) literally means "childhood friend".