Ayumu Kasuga

Height: 156 cm Ayumu Kasuga is a transfer student from Osaka. Tomo expecting her to act like the stereotypical Osakanloud exuberant and fond of jokeschose for her the nickname Osaka although Ayumus behavior could not be more different. Ayumu considers the name slow and spacey but she lacks the energy or motivation to dispute it. The nickname sticks so well that she is called Osaka by teachers and even in the class roster to the point that no one remembers her real name. In the manga Osaka mentions that she lived in Kobe when she was in elementary school and was born in Wakayama. Tomo who says she doesnt know where Wakayama is tells Ayumu to just be Osaka. Source: Wikipedia