I assume it’s another akashibito. The wandering person also had a similar coat to shiro, and could sense that his presence isn’t one of human like he was. Representing that the story continues to others like him.
I had a feeling it might have been another akashibito, but wasn't sure if it was someone shown previously in the manga whom I had forgotten. Thank you!
You know, I also thought that, but then I had a fear that he might have caught a crush. Like a love from first sight thing, and that he felt chilly because he once again became a spirit. But you know, your version is more cheerful.
Can someone explain what the last few panels of Shiro gazing at someone passing by with a scarf, coat and black hair represent?