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.
In 'the watcher 2022 story', the family members are the main characters. The parents who are excited about their new home initially, but then are terrified by the letters from 'The Watcher'. Their children also play a role as they are affected by the whole situation in the house.
Since we don't really know the details of 'the watcher the story', it's hard to say who the main characters are. But surely, there must be a 'watcher' as the name implies. There could also be people or entities that the watcher is observing.
There are the family members like the couple who bought the house. Their reactions to the whole 'Watcher' situation are central to the story.
Since I'm not familiar with the exact 'the watcher novel', it's hard to say for sure. However, if it follows a common pattern, there could be the titular watcher as a main character. There might also be a person or a group of people that the watcher is focused on. Maybe there's a secondary character who discovers the watcher's presence and tries to figure out their motives, and this character could also be considered a main character as they drive the plot forward.
If the Watcher Story is a heroic adventure, there might be the Watcher as the main character, and perhaps a sidekick or a mentor figure. The sidekick could be someone who helps the Watcher in their journey, while the mentor could be an older and wiser character who gives the Watcher advice and guidance. Another possible main character could be the antagonist, someone who is against the Watcher's goals and tries to stop them.
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.
The family members are the main characters. I can't recall all their names exactly, but there's the couple who bought the house and their kids.
I don't know for sure, but it's probably the 'other watcher' mentioned in the title.
Perhaps there are lead watchers among them, like an experienced elder watcher who guides the younger ones. There could also be characters who interact with the watchers, such as villagers or townspeople if the story is set in a village - like setting. These non - watcher characters might be in need of the watchers' protection or might have some information that is relevant to the watchers' mission.
Since I haven't read it, I'm not sure. But it could be the people who are being watched by the ghost.