First, know the Genshin characters well. Their personalities, backstories, and abilities are crucial. For example, if you're writing about Zhongli, his wisdom and past as a god should be reflected. Then, create an interesting plot that involves the reader in a unique way. It could be a journey through Teyvat or a mystery to solve together.
One great 'genshin x reader fanfic' is 'A Journey with Diluc'. It beautifully captures the essence of the Genshin world and the relationship between the reader and Diluc. The story has a great plot that keeps you engaged.
A really cool genshin x honkai fanfic idea might be a time - travel story. Imagine a character from Honkai going back in time to the events of Genshin Impact. They could try to change something in the past that has implications for both universes. Or perhaps a story where the gods in Genshin Impact are somehow related to the higher - level beings in Honkai Impact, and a fanfic could explore that connection.
A really interesting fanfiction is 'Love Blossoms in Teyvat: Lisa x Traveler'. It focuses on the more emotional side of their relationship. It delves deep into how they might feel for each other. There are many sweet moments where they share their thoughts and dreams, and the way the author writes their interactions makes it a very engaging read.
I really like the fanfiction 'The Journey with Ningguang'. Here, Aether and Ningguang go on a journey outside of Liyue to explore some ancient ruins. Along the way, they share their dreams and fears, and gradually their relationship evolves from mere acquaintances to something more. It's a very heart - warming story that showcases their different personalities really well.