I'm not sure exactly as I haven't read this particular fanfic. But it might be about Harry Potter expanding his collection of cars in a fictional scenario. Maybe he discovers some magical cars or uses his wizarding skills to enhance or grow his car collection in a world where cars and magic co - exist.
Definitely Harry Potter. In addition, there could be characters from the Ministry of Magic who either support or oppose his car - collecting activities. There might also be some muggle characters if the story involves interactions between the wizarding world and the muggle world regarding the cars. It's also possible that Dumbledore in some way has an influence on Harry's new pursuit, either guiding him or warning him, which would make Dumbledore a significant character in this fanfic.
Well, perhaps there could be a magical flying car like the Ford Anglia that he and Ron flew in the original story. It might have some upgrades in the fanfiction, like being able to transform into a submarine - like car for underwater adventures.
Obviously, Harry Potter himself could be the main character. He could be the one driving the car or be a passenger when the accident occurs. His friends like Ron and Hermione would also likely be involved, either in the car with him or coming to his rescue after the accident.
One possible plot could be that Harry is on his way to Hogwarts in a magical car (like the Weasley's flying car). Suddenly, they encounter a powerful dark magic spell that causes the car to malfunction and crash. Harry then has to use his magic skills to save himself and his friends while also dealing with the threat that caused the accident in the first place.
In this fanfiction, Harry Potter might be facing a new situation in the Muggle world. Buying a car could be a sign of his further integration into Muggle society. Maybe he uses his wizard money to buy a really cool and unique car, like a classic convertible.
It could be interesting if in the fanfiction, Harry buys a car that has some magical properties. For example, a car that can fly like a broomstick or a car that can become invisible at will. This would be a great way to blend the wizarding and Muggle worlds.
A story could be centered around a tournament in the combined world of Harry Potter and Kantai Collection. Wizards and shipgirls compete in various challenges. For example, the shipgirls might have to navigate through a magically - created maze, while the wizards have to use their magic to repair damaged ships. Harry and his friends would be in teams with some of the shipgirls, and they have to learn to work together to win the tournament.
The expansion of the Mustard Dun referred to the expansion of a character in the anime " Wenhao Wild Dog." He was one of the most popular characters in the novel, attracting the attention of many viewers because of his unique plot and wonderful storyline. However, the search results provided so far did not contain any information about the expansion of Kaitun, as well as the prediction and analysis of the plot. Therefore, I am unable to provide an answer to the specifics of Jiedun's expansion.
Well, just based on that title alone, it's difficult to determine its quality. There are so many aspects that make a Harry Potter fanfic great. For example, it could explore new relationships between the characters, or create exciting new magical adventures. But we don't know if 'skull is harry potter fanfic' does any of those things. So, it might be good, it might not.