In the beginning, MacCready wasn't really sure why he agreed to work with you. Maybe it was how naive you seemed, how oblivious to the dangers of the Commonwealth you were. The four hundred caps didn't hurt either.
But now he followed from simple worry.
After he lost Lucy, MacCready wasn't sure he could love anyone ever again. You managed to get under his skin in much the same way Lucy had. Always playing at pre-war house despite literal mutants attacking. MacCready would follow you anywhere.
"Absolutely not." He snagged your arm, yanking you away from the entrance to the train tunnel, "We are not going in there."
You almost fell at how hard he yanked, irritated immediately, "RJ!"
He was already tugging you the other way, "We're not going in the fucking train tunnel."
"I have to see if there's anything worth selling down there! We need the caps!" You protested.
He'd never told you about Lucy's death, about the ghouls that ripped her to pieces and left him as a single father, about the nightmares he still had from losing her.
"There's not a damn thing in train tunnels worth risking your life for!" MacCready snapped, anxiety and anger growing by the second.