Kasumi Ishiki

Kasumi Ishiki is the main protagonist of this story who was diagnosed by the Medusa virus along with Shizuku Ishiki (Kasumi's twin sister). 160 people out of the world were chosen to be cryogenically frozen until a cure was found and Kasumi was one of those few selected. She is devastated by the fact that Shizuku was left behind and the mere thought of leaving her to die.