Typically, they often center around the relationship between Childe and Lumine. It could be a friendship, a partnership in adventures, or sometimes a hinted romantic relationship. For example, in many fanfics, their contrasting personalities are explored, like Childe's boldness and Lumine's more reserved nature.
Another aspect is the creativity in how the harem is formed. It could start with chance encounters, shared quests, or even some sort of magical or fateful connection. The fanfic authors often play around with the existing game mechanics and storylines to create unique scenarios for Lumine's harem. And they also focus on how Lumine's actions and decisions affect the dynamics within the harem, making it a complex web of emotions and interactions.
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.
There is a Genshin Impact manga available. It brings the game's world to life on the page with beautiful art and engaging storylines. It's a great companion to the game.