You lost their paths along the way.
Download the walkthrough to see where you could have lost them
Just finished the game and, I LOVED IT, for me in my humble opinion best girl is Lauren or carla, rebecca was also good, and my favorite character was Stabby mike (fucking love that dude, probably was best decision breaking him out). Caribdis keep doing masterpieces like this and can't wait for you to finish eternum. keep up the hard work ;)