The main characters are clearly young Joseph and Dio. Joseph is a character with a strong will and unique abilities, especially his Hamon. Dio, on the other hand, is a powerful vampire with his own set of formidable powers.
Perhaps a plot point where the power dynamic between them shifts unexpectedly. Maybe Joseph discovers a weakness of Dio that no one else knew, leading to a very tense and exciting confrontation. In fanfiction, this could be something completely new and creative that the author invents.
The determination of whether the novel 'Dio' is canon can be complex. It might involve factors like consistency with established lore, authorial intent, and the response from the fan community. Without specific details, it's hard to give a definite answer.
One aspect that could make it unique is the creativity of the fans. Since it's fanfiction, the writers can take liberties with the existing lore of 'Star vs the Forces of Evil' and incorporate Horse Lemon in a way that showcases their own ideas and interpretations. It might introduce new relationships, storylines, or character developments that are specific to this niche fanfiction area. For example, they could create a story where a character has a special bond with a Horse Lemon that affects the overall plot in a completely new way.
There are the Aliens, of course, with their menacing appearance and deadly attacks. And the Predators, who are the hunters in this story, with their advanced weaponry. There are also some human characters who often find themselves caught in the middle of the Alien - Predator conflict.
One of the unique things is its exploration of the lore. It dives deep into the backstories of both the Aliens and the Predators. It also has some really cool character designs that are true to the original concepts of these species, making it stand out among other graphic novels.
One common theme is power struggle. Since Dio is a very powerful character in the Jojo universe, when there's a female version or a female related to Dio, she often has to deal with the power dynamics. For example, she might be trying to gain power like Dio or struggling against his overpowering influence.
In my opinion, the Dio manga works quite well. The character development and the way the story progresses are well-executed. Also, the art style adds to the overall appeal.