Violence has been a constant in Sam's life for so long that she can't imagine living without it. She wants to be good, but after everything, she just doesn't know if she's capable of that.
The oldest of the Hunter siblings, Ben has built his life around trying to protect and take care of his family. Blood or not. He would do anything for the people he loves, no matter the personal cost.
Her family fell apart years ago, and she's been trying to repair the damage since. Just when she thought they stood a chance, Eden's Gate rolled in an destroyed everything.
Jacob's favorite Chosen never even wanted to join Eden's Gate. Brought in against her will and put through the trials, she finally found a purpose, and in Jacob, a friend. She stays because he's all she has anymore.
For someone whose entire job is based on working well in high intensity situations, Michael has a lot of anxiety in his body. Being taken hostage by Eden's Gate didn't do much to help with that.