音無 初音

音无初音是结弦的妹妹。她被诊断出患有癌症，已经卧床不起两年了。在此期间，结弦充当她的监护人，经常去探望她，给她漫画看并陪伴她。与哥哥相比，初音喜欢学习，迫不及待地想要上学。然而，她的病情使她无法外出。 [摘自 Angel Beats! Wikia]

简介来自 VNDB · 由机器翻译生成

Otonashi Hatsune is Yuzuru's younger sister. She was diagnosed with cancer and has been bedridden for two years. Within this period, Yuzuru acts as her guardian, usually visiting her to give her manga to read and to keep her company. Compared to her brother, Hatsune enjoys studying and couldn't wait to start school. However, her sickness kept her from going outside. [From Angel Beats! Wikia]

简介来自 VNDB