Another great chapter! Thank you for continuing to work on this story despite issues IRL. Obviously, your physical and emotional health have priority but we enjoy your work.
I predict Armstrong is going to be very uncomfortable in the next chapter.
Matrix and Tetra are going to be showing off skills and abilities which surpass any other parahuman Armstrong has ever seen (except, perhaps, Eidolon) while showing respect and deference to Apeiron. Meanwhile, Joe will be moving about among the traumatized survivors like superohero-Jesus, healing bodies and souls.
Elvish singing? At this point Joe's voice is magical when he just murmurs. A simple greeting, learning a patient's name, and a short conversation in which Joe says "you are strong", "have hope", "everything will be okay if we work together" WILL be a life-changing experience.
I'm imaging a crowd of people smiling, weeping, and embracing each other by the time Apeiron is ready to leave, Armstrong being objectively aware that he should probably be concerned about Master effects but feeling holistically better than at any other time in his life, then one of the Forge crew casually mentioning as they are leaving that the S9 has finally gotten close enough to Brockton to justify action by the Forge.