On episode 3s today. Can't decide on DP so I'm advancing their scores to equal again. K2/Y2.
Shiki ruminations, spoilers so pink hair went to the creepy couple's big house, later found outside, died from ??? but showed signs of blood loss. IIRC she was covered in "insect" bites. After a few more ??? deaths, Nao died from similar symptoms, also with "insect" bites. Her husband flashed back to her inviting the creepy couple over; episode ended on blond boy inviting another of their family in. Considering these facts (blood loss, '"insect" bites, invitation), oh and wild dogs, my initial hypothesis is they're a bunch of Dracula style vampires
Though I don't think it'll be so cut and dry, I've got good feelings towards the suggestion they are cuz Dracula is a fantastic book. Mystery/horror anime is a fun genre that I want to watch more of. RIP blond boy?