Hiding among us

...A terrible catastrophe is going to destroy Earth in a couple of years,so eleven astronauts from all the world are reunited to search for a suitable planet in Space thanks to the spaceship called :"Travelling Galaxy"
Nikushimi,a woman hiding her true identity,was hired by the government in an hitman mission,to kill a traitor and parasite that could be hiding in the shadows
It's said that this parasite is tormenting Earth since the start of the chaos,ready to destroy every single living thing it meets on it's path,controlling the mind of the human host to strike.
Manipulation,mind control and intense bloodlust,the parasite can take the form of the living,it can play with your feelings,it can be smarter than any human,it can claim your mind,feelings,and coscience,while growing inside you.
In one hundred years,the Earth is gonna get destroyed by meteorites,that are finally going to enter it's atmosphere,and everything those astronauts love and care about will be destroyed.
Nikushimi has to kill,for the sake of the planet
No mind,no emotions,no remorse,a mantra they she always followed until the end,wich made her feel like a pathetic obeying puppet
A quick and painless death,to prevent the humanity's downfall,even if it means milk my everyone
In that airship,one of those people,
Is an impostor among us,hiding in the shadows,and playing with Humanity's last Hope of salvation
But for them, it's just a game,a game between so etching so powerful,and the weakness of humans
Just a game
Of torment

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Among us belongs to InnerSloth,and all the pictures I will use belongs to their proper artists

Some things will be changed,like tasks that will be able to be done by everyone even impostors,and travelling in vents.