Maybe the complex relationship between the two characters. The idea of one character hurting the other can create a lot of drama and tension, which is often interesting in fanfiction.
There are so many fanfictions out there that it's difficult to specifically point out ones related to 'zane truesdale hurts syurs'. You could join relevant fan groups or forums and ask the members there. They might be able to direct you to some good ones.
You can start by looking on fanfiction.net. It has a large collection of various fanfictions, including those related to Zane Truesdale and original characters. Just use the search bar and type in relevant keywords.
One great Zane Truesdale OC fanfiction is 'The Rising Star of Zane'. It focuses on an original character who becomes Zane's protégé in the dueling world. The story is full of exciting duels and character development.
It could be an old rival from his past dueling days. Someone who has always been envious of Zane's success and finally sees an opportunity to take him down, either physically or in a more metaphorical sense like ruining his reputation.
One possible reason could be a rivalry over a powerful card in a card game. Maybe another character has a card that Zane desperately wants for his deck, and their negotiations turn sour, leading to a fight.
Atticus and Zane are likely characters created within the fanfiction world. They could be friends, colleagues, or even rivals. Without more context from the actual fanfiction, it's hard to say exactly who they are. But they are the main characters involved in this shaving - related situation.
They are likely characters within the context of the fanfiction. Without reading it, it's hard to say exactly who they are. They could be original characters created for this fanfiction, or they could be characters based on an existing fandom, like a book, movie, or TV show.