Infected (Imposter X Reader)

Y/N join in the space program that 10 people will an opportunity to travel in space for free. She just need to training and She doesn't need a collage degree. It should be a fun adventure of being in space and making new friends for her right? WRONG! There is an imposter among her who will stop at nothing to sabotage the ship and kill everyone. But it's more hesitant in killing Y/N than the others. Now, Y/N has been infected which is making her less and less human in every hour.