Her background includes a childhood friendship with Munemitsu Soga, whose resentment over her potential romantic interest in classmate Kenta Kogure evolves into obsessive stalking, adding complex tension within the confined group. Following prolonged captivity and psychological torment, she witnesses the captor's demise, offering physical escape but leaving deep emotional scars. Over time, she and the other survivors gradually work towards overcoming this profound trauma. In certain narrative resolutions from the source material, successfully ensuring the safety of all captives can lead to her forming a romantic relationship with Kenta Kogure.