Interesting opening chapter. I'm looking forward to seeing where you take this.
I'm here to fill the staff review request you made *hides head in shame* about 6 weeks ago.
First off, I have absolutely zero knowledge about The 100, so I am probably not the best person to be reviewing this. Keep that in mind. :P
At the beginning of this chapter, I didn't know a single thing about The 100. Due to hints that you left in this first chapter, I now have a couple of rudimentary guesses. It seems like there is a group of people (? beings?) who have come to a radioactive/possibly-post-apocalyptic Earth from space, and there's been a lot of bad stuff that has happened, one of which is that 100 of them have died so far. Or else that their group is 100 in size. (I'm not sure which of those two.)
As a person not familiar with the fandom, I found the number of characters introduced in this chapter to be confusing. However, I think that someone familiar with the fandom wouldn't necessarily have that issue, because when I think about reading a Harry Potter fic in which a bunch of characters are listed in the first chapter, those characters are familiar to me, and I don't necessarily like having them explained to me.
I definitely thought that the name of this chapter was very apropos for the events that occurred in it. The two POV characters were both experiencing a great deal of emotional pain, and one of them at least is experiencing physical discomfort and pain as well. For Clarke, at least, I see her physical pain as a self-inflicted punishment. She's already beating herself up mentally and experiencing a lot of pain and trauma and guilt, and she seems to think she deserves the physical pain. At least, that's what I got out of it.
I hope that Clarke winds up with a happier resolution in your story. I liked her well enough despite all the angst and not knowing her backstory to want that for her.