I don't know for sure, but it's probably the 'other watcher' mentioned in the title.
Since I don't know the exact story, it could be the Westfield Watcher themselves. They are likely to be the main focus if the story is named after them.
Since I don't know the details of the '657 boulevard watcher story', I can't say for sure who the main character is. But it's likely the 'watcher' mentioned in the title.
Since we don't have much detail, it might be the one who first discovers the presence of the watcher. This could be someone who moves into a new place, like an old house, and starts to notice odd things that lead them to suspect there's a ghostly watcher. They would then be the main character as they try to figure out what's going on with this watcher.
Without further information, it's impossible to determine. It could be an ordinary person who found themselves in a situation where they became a watcher. Or it could be someone with a specific role, like a journalist or a detective, if the story is related to that kind of context.
As the title is so unclear, it's impossible to determine who the main character is. It could be the 'watcher' but without more information, we can't be sure.
I'm not sure as I haven't read the book. But typically in a collection like this, there could be a variety of main characters in different stories. Maybe there's a character who is the watcher, or there could be characters who are being watched.
Since I don't know the exact story, it could be 'the watcher' as the title implies.
I'm not entirely sure who the main character is without more in - depth knowledge of the story. But often in such gothic ghost stories, it could be the person who first discovers the strange happenings in the woods.
The watcher could be a mysterious figure whose identity is revealed gradually throughout the story.
Since I don't know the specific 'watcher story', it's hard to say. But likely there's the watcher themselves. There could also be someone or something that the watcher is observing.