Kasumi's twin sister, identical to her if not only for their hairstyle, the fact that she didn't wear glasses, and her upbeat and cheerful personality. Infected with Medusa, despite being left out of those chosen to be cured, among who there was her own sister, she still greatly supported her and insisted for her to take the chance to be saved from Medusa.    ~!Their bond grew increasingly strained after Shizuku witnessed Kasumi trying to kill herself, and again when, before parting with each other, Kasumi wished for them to commit suicide together, being incapable to accept a world without her twin. During the ensuing struggle Shizuku accidentally pushed Kasumi over the cliff they were standing, and shocked at the death of her sister, awakened her Medusa power.   Transported into Level 4, still overwhelmed by the memory of her sister's death, Shizuku created a countless amount of abominations, initially blobs of quivering flesh, maws and claws which laid waste to the labs while massacring the staff, and only through Zeus' mind-controlling program conceiving the creatures that would populate the ruined island, such as the dinosaurs encountered by the protagonists at the beginning. Also, it is revealed that the monstrous behemoth encountered at the beginning of the manga, and later shown occasionally as the "mother" of the creatures, was Shizuku herself, the beast being an unconscious armor to seal herself from the world.   While often mentioned by Kasumi during the course of the story, Shizuku appeared often, other than in her monstrous form, through ominous apparitions, often Kasumi's delusions or unconscious mental links between the sisters, and only in the end she appeared at the core of her mutated form, begging Kasumi not to uncover the fact that she was only a Medusa-made creation, and that her true self had died. With the death of Zeus, she too ceased to exist, her monstrous body crumbling to pieces and her essence fading away peacefully. !~ (Source: Wikipedia) 

Panic spreads worldwide as the Medousa Virus threatens to wipe out the human race. Kasumi is one of 160 people chosen to be cryogenically frozen while a cure is found. When she awakens to find the facility overrun with thorny vines and ravenous monsters, Kasumi and six others struggle to survive this labyrinthine nightmare. If they survive, how long do they have to live?<br>
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(Source: Crunchyroll)

__Hobbies:__  Jazz dancing and Soft tennis

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Eri Sendai is a Japanese actress and voice actress from Japan. Her major roles in anime include Kurumi Mimino/Milky Rose in Yes! Precure 5, Rei Saotome in Yu-Gi-Oh! GX, Kōrin Sa in The Story of Saiunkoku, Yukari Morita in Rocket Girls, Yuuhi Shimbara in Neo Ranga and Arika in Medabots.

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Two twins, separated by fatal illness and a selective cure. Kasumi and her sister, Shizuku, were infected with the Medusa virus, which slowly turns the victim to stone. There is no cure, but of the two only Kasumi is selected to go into a sort of cryogenically frozen state along with 159 others until a cure is found. At some point in the undetermined future, Kasumi awakens to find herself and others who were in suspended animation in an unfamiliar world with violent monsters. Resolving to unlock the mysteries of her current situation and the fate of her twin sister, Kasumi struggles to survive in a treacherous world.<br><br>
(Source: Tokyopop)

Shizuku Ishiki