Takayanagi being turned into that dog reinforces the theory that Wamiya is actually Takayanagi from the previous timeline.
Only that time, he was turned into a bird instead of a dog, and humanity was destroyed. And he remained on the spiritual plane serving the himegami.
Mirrors his attitude with the present Takayanagi how after being turned into a dog, is much humbled and more on Izumiko's side now and now knows his place.
|