BUTTERS!
I think we can all agree that Butters is one of the most loveable dorks ever, and I also think we can all agree that Harry better protect this little dweeb with everything he's got or we are all going to be majorly pissed.
These three chapters all concern Butters and his sudden involvement in the plot, because this is no "Oh geez I got accidentally caught up on the periphery of Harry's adventure" kind of situation. Nope, it was pure dumb luck that Harry was at the morgue at all, because the Bad Guys(TM) come looking specifically for Butters. In fact, if anything it's HARRY who is getting caught up in the periphery of BUTTERS' adventure. What a fun little reversal.
The final chapter in the trio is Harry trying to explain to Butters that there's a whole wild universe out there that Butters bumped up against when he said that the vampire bodies were "humanoid but definitely non-human", and even though Butters literally just watched a dead man sprint after their car, he has a hard time accepting it. It's okay, Butters. You'll get there.
Hopefully.
Thanks for listening!