"Suddenly, a white fog enveloped me, and I found myself thinking of those words, Red Yin said."
"...When Red Yin was a child, I helped her comb her hair. It might just be because I miss my grandmother so much that I feel like Red Yin has come to this village. But when I think about it..."
"There's obviously no connection between Red Yin and this accident with the grandmother, but Red Yin's sudden mention of her disturbed the white fog a bit."
"In truth, I've been thinking too much about my grandmother. I've even mistaken people for her, and I'm just like them, brother... that's what it is."
"Not too good... I'm scared of these people down there,"
"You're overthinking it, Red Yin," he said smoothly, his expression becoming stern again. This accident also came as a surprise at the end of the welcoming route."
Maybe some of those stone heads were just played by ordinary people, or the main characters in a marriage ceremony in the main hall, for some coffin material issue.