"That, I do not have the answer to. Maybe the train has answers and require more research."

He'll answer the question anyway, sensing he is inquisitive. "Different worlds. It exists. Originally, Wei Ying and I came from our world. Then we woke up in Hakagemachi, which is like a city but exists in a different plane, a dimension of its own, and there's no people, only spirits. That's where we find our youkai...animals spirits. I'm a host to a ghost cat. Wei Ying is host to a fox spirit, which is why he has many tails."