Since I don't know the actual story, it's hard to say. But likely, the main character is the 'guest' mentioned in the title. This guest could be anyone, perhaps a traveler, a curious explorer, or just someone who accidentally ends up in a spooky place.
I'm not sure specifically as it's not a well - known common title to me. It could be a story about someone being a guest in a spooky or haunted place. Maybe it involves a person who encounters ghosts or strange phenomena while being a guest in a particular location.
Since I don't know the exact 'guest short story', it's difficult to say. But it's likely that the guest is one of the main characters. There could also be a host or other people who interact with the guest, like the family members of the host if it's a story set in a domestic environment.
Typically, in a 'the christmas guest story', there would be a family or a person who is preparing for Christmas. Then there is the special guest. This guest could be someone from afar, perhaps a traveler, or someone with a unique story. There might also be other supporting characters like neighbors who interact with the main characters during the Christmas events in the story.
I don't know as I haven't read the story. But it could be the guests themselves, perhaps there is a host who also plays an important role.
Since I don't know the exact 'guest book story', I can't say for sure who the main characters are. It could be the guests who write in the guest book, or it could be the owner of the place where the guest book is kept.
In the Ghost Rider story, the main character is often a man who has made a deal with the devil, like Johnny Blaze. He then becomes the Ghost Rider, a being with a flaming skull and amazing powers. He's the one who rides the motorcycle and battles evil.
Oiwa is the main character. After being treated terribly by her husband, she becomes a ghost. Her story is centered around her misfortunes and her subsequent revenge as a spirit.
Since I don't know the exact story, it could be the navigator himself. He would be the central figure as the story is named after his ghost.
The main character in the 'ghost walker story' could be an old hermit who has been living alone in a haunted place for years and has gradually become a sort of ghost walker. He might have some special connection to the spirits in that place, and through his experiences, he has gained the ability to move in a way that is similar to a ghost. Maybe he uses this ability to communicate with the ghosts and try to resolve some long - standing issues in the haunted area.
The main character is probably Satsuki. Since the story is named after her, she's most likely the central figure. She could be a young girl or a woman. Maybe she has some special ability that makes her more sensitive to the presence of ghosts, or she could just be an ordinary person who gets caught up in a spooky situation.