Shion's Grandmother

Shion's Grandmother is the grandmother of Shion Watanabe. She raised her after the tragic death of both Shion's parents because of cancer.

Plot
She keeps Hiro Shishigami in her apartment after he had run away from the police officers.

During the first night, Hiro went into her room with a plan to kill her while she is sleeping but he then refuses.

Eventually, the police track down Hiro’s location and break into her apartment. The SWAT team gun down both Shion and her grandmother, enraging Hiro who carries both of them and flies off into the sky.

Hiro lands in a secluded area, while apologizing profusely he heals them and flies away intent on revenge.

Shion and her grandmother are seen again later on living in a different apartment. It is revealed that Hiro has been sending them money every week to help them and as an apology.

Trivia

 * In the live-action film, Shion and her grandmother are both killed by the SWAT team sent to hunt down Hiro.