Evolution from Serum to Subject 07 on

Now, real quick, I would like to explain the thought process of my creations. It started with a genetic code both RNA and DNA that were found on an alien planet that had limited life. After being altered and causing the death of the first 6 subjects. Subject 07 was the only one whose blood showed even a slight resistance to the complete necrosis of the body, hence why she was chosen. Now once the serum was injected into her, it went straight to the mitochondria. For those who don't remember science from high school, the mitochondria is the powerhouse of the cell. It controls everything. I pulled this inspiration from Parasite Eve. But that is were it stops. Each of the worms is a mitochondria that has been overridden and forced to grow to the proportions that you see. This is why every creature you will meet will have been at one time a human being, or a group of human beings. Everything that they turn into will be just within realism. There wont be any space dragons or goblins showing up. Now the enemies that our cast will face will change once they land....