Yanfei is one of the few selfish DPS characters available in Genshin Impact. As she owns a Pyro Vision, she has a lot of potential when it comes to Elemental Reactions. Players can pair Yanfei with a Hydro unit for Vaporize, a Cryo support for Melt, or even an Electro character for Overload. Other than that, as the legal adviser is highly-reliant on her Elemental Burst, she'll also need a battery. For this job, the most viable Genshin Impact unit would be Bennett.