Yes, there are some really good Zeref stories in Fairy Tail. Zeref's backstory is quite fascinating. He was cursed with immortality and his actions throughout the series, like his relationship with Natsu, add a lot of depth to the overall plot.
One good Zeref story is about his origin. How he became cursed with immortality and how that changed his life. Another is his relationship with the demons he created. It shows his power and his inner struggle with his dark nature.
Well, it depends on the specific fanfiction. Some fanfictions do make Zeref and Natsu brothers. This can create some really cool plot twists. For instance, it could change how Natsu views his powers if he discovers he's related to Zeref. And it might also make Zeref more protective or possessive of Natsu in a different way than in the original story. It's a concept that allows for a lot of creativity in the fanfiction world.
The victory could be attributed to the development of the main characters' skills and their unwavering determination. Also, they might discover some hidden secrets about Zeref that give them an advantage.
In Fairy Tail Zeref Familiar of Zero Fanfiction, one might expect to see unique interpretations of Zeref's powers. Maybe he gains new abilities or uses his existing ones in unexpected ways due to the influence of the 'Familiar of Zero' world. It could also be a chance to delve deeper into the lore of both series. Writers might create new backstories for Zeref that tie in with the concepts from 'Familiar of Zero'.
It could be a tragic kiss. Given their complex relationship in the Fairy Tail lore, perhaps the kiss is a final goodbye. Zeref, with his dark nature, might be sacrificing himself or being forced to part from Mavis. And this kiss holds all the unspoken words, all the love that could never be fully realized in a normal way because of their fates.
One common theme could be power and its consequences. Zeref in Fairy Tail has a complex relationship with power, and 'Familiar of Zero' also has elements of power struggles. Another theme might be the exploration of different magic types. Since both series have their own magic systems, fanfiction could blend and compare them. For example, the dark magic Zeref wields and the magic used in 'Familiar of Zero' could be contrasted or combined.
One common theme is the exploration of their shared past. Since they are brothers in these fanfictions, writers often dig into what their childhood might have been like.
A possible plot idea is that Zeref is cursed, and Lucy, with her kind heart, tries to find a way to break the curse. Along the way, they face many challenges together, and their relationship evolves from distrust to mutual understanding and perhaps even love. They might also encounter other Fairy Tail characters who are initially against their association due to Zeref's reputation.
One common theme is redemption. Since Zeref has a dark past, the kiss could be a step towards his redemption. Mavis, being a more positive character, might be the catalyst for this change through the kiss.