One great Lumine x Reader fanfiction is 'A Journey with Lumine'. It beautifully captures the essence of traveling with Lumine in the game world. The author does an amazing job of describing the interactions between Lumine and the reader, making it feel very immersive.
The popularity of Lumine x Reader fanfiction lies in the character of Lumine herself. She is a strong, independent and mysterious character in the game. Readers are attracted to the idea of having a personal connection with her in fanfictions.
A theme that is less common but still present could be mystery. In these fanfictions, there could be a mystery surrounding Lumine and Kody Lemon's relationship or something they need to solve together. It could involve hidden pasts, secret powers, or a mystery related to the world they are in. And of course, there are also fanfictions that combine multiple themes, creating a more complex and interesting story.
You can try looking on fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. These platforms usually have a wide range of fanfictions, including those related to Lumine x Kody Lemon. Just use the search bar on the site and type in the relevant tags.
As of now, the Genshin manga is not finished. The story is still evolving and there's more to come for fans to enjoy. The creators are taking their time to develop a rich and engaging narrative.
There's no definite answer yet. It might continue if there's enough demand and the creative team has more story to tell. But it could also stop if they feel they've completed the story arc.