Another theme might be isolation. Matilda could be alone in the city, and the presence of the ghost could heighten her sense of isolation. Also, it could touch on the theme of the past haunting the present. Maybe there are events from the city's past that are coming back to haunt Matilda in the form of a ghost.
I'm not really sure which specific 'Matilda Urban Ghost Story' you're referring to. There could be many fictional stories with that name. It might be a local or self - published ghost story about a character named Matilda in an urban setting.
One possible theme could be redemption. If there is a character who has 'fallen', they might be seeking redemption. Another theme could be justice. DCI Matilda Darke is likely to be striving for justice in the story.
Another theme could be fear. Ghost stories are often about creating fear, and in '222 the ghost story', the unknown elements related to '222' might be used to instill fear in the readers or listeners. For example, if the ghost always haunts at 2:22, that specific time can be a source of fear. Also, the presence of the ghost in the story would naturally bring a sense of dread and unease.
One of the main themes is the power of knowledge. Matilda, despite her young age, has a thirst for knowledge which helps her overcome the difficulties in her life. Another theme is the fight against injustice. Matilda has to deal with the cruel adults in her life like Miss Trunchbull, and she uses her intelligence to stand up to them.
A theme that often shows up is Matilda standing up against new forms of oppression or unfairness. In the original story, she fought against her cruel parents and the mean headmistress. In fanfiction, she might encounter different villains or unjust situations in her community or a new school she attends, and she uses her intelligence and powers to fight for what's right.
One possible theme could be the fear of the unknown. Since it's a ghost story, the mystery surrounding the ghosts and their existence can create a sense of unease.
One possible theme could be isolation. If the boy is a ghost or has ghost - like qualities, he might be isolated from the normal world.
One possible theme could be revenge. If the ghost in the story is that of someone who was wronged, they might be seeking revenge on those who caused their misfortune.
One possible theme could be fear. Since it's a ghost story, Cheryl might be constantly afraid of the unknown and the ghostly apparitions she encounters.
One possible theme could be fear. Ghost stories are often centered around instilling fear in the readers, and if 'windover' is a spooky place, it can be a great source of fear.