Yanfei enjoys appraisal, reading and is very knowledgeable on many topics most notably the law, due to her career as a legal advisor. She claims to have extensive knowledge of the laws of the other nations in Teyvat. She is well known by the people of Liyue for her knowledge and is considered the premier legal advisor. Yanfei has a playful nature but takes her job seriously. Yanfei enjoys tofu because of its versatility and availability. She dislikes cold food and she rarely eats them.