Genshin Impact: The Twinning Adventure of Lumine and Ying in Teyvat

Intro: Synopsis: Twin Lumine, a system (an early semi-transparent Paimon, but after upgrading in Liyue, she transforms into human form and becomes a main combat force~), not an overpowered protagonist, no gender bending. Points of contention in this book: The protagonist is a naive and sweet character, not very strong in Mondstadt and easily gets into trouble. However, after obtaining dual elements in the Liyue arc, she improves significantly and is much more friendly compared to Lumine (Note: even Lumine herself in the game has almost never killed humans). Therefore, Ying almost never kills unless her family or friends are threatened (referencing Spider-Man or Batman). So, a friendly reminder, if you dislike this type of protagonist, it's best not to read this and get frustrated.