As a human, Hantengu had various wives. But he was a paranoid and untrusting man, and ended up killing them.

Except one. There was one wife he fell deeply in love with, the only one he ever trusted. He was absolutely smitten, but his paranoia caused her to take her own life.

So when the demon’s clones saw you in the village they were attacking, someone who looked exactly like their deceased wife, they knew that she’d been reborn.

And they became absolutely obsessed with you.