As we have limited information about the 'seraphina original story', we can only assume that if the story is named after a person, Seraphina would be the main focus. However, there could be other important characters as well that play significant roles in the story.
I haven't actually read this particular fanfic in full. But generally, in fanfics about John and Seraphina from 'unordinary', the relationship between the two characters can be explored in many interesting ways. Maybe this fanfic focuses on their friendship or a potential romantic relationship in a unique setting within the 'unordinary' universe.
Shanann Watts was a pregnant woman who was tragically murdered. Her husband, Chris Watts, was responsible for her death. He had an affair and wanted to start a new life without his family. He first killed Shanann and then their two young daughters. It was a very sad and disturbing case that shocked the community.
One great 'Unordinary John x Seraphina' fanfic is 'A New Bond'. It explores their relationship in a post - school battle scenario where they have to team up against a new threat. The way the author develops their characters and the chemistry between them is really engaging.
You can try fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. These platforms have a vast collection of fanfictions for various fandoms, and there's a good chance you'll find John and Seraphina fanfictions there.
One common theme is friendship turned into something more. Their initial acquaintance might be as friends, but as the story progresses, romantic feelings start to develop.
One of the best - selling fantasy novels related to a character named Seraphina could be 'Seraphina' by Rachel Hartman. It's a popular book that combines elements of dragons, court intrigue, and a strong - willed protagonist. The unique world - building and complex relationships in the story have attracted many readers.