Li Yifei and the Saintess were both martial arts experts, but that didn't mean they were impervious to rain. When the heavy rain fell, they would get drenched just like everyone else.
Additionally, there was Xu Yingying, and Li Yifei was especially unwilling to let Xu Yingying get wet. Fortunately, knowing the weather here was prone to rapid changes, and that it rained whenever it was forecasted to, Li Yifei had brought rain gear. While searching for shelter from the rain, he hurriedly opened an umbrella.
The rain came down furiously. No sooner had Li Yifei opened his umbrella than the downpour started, and the torrential rain was too much for one umbrella to handle for both of them.
Li Yifei quickly protected Xu Yingying, but it seemed to be insufficient. Another umbrella was raised, shielding Xu Yingying from above. It was the Saintess.