Since we don't know the full story, it's hard to say for sure. But generally, in many cultures, snakes can symbolize different things. The rat snake might be a test for Kali, like a trial of courage or wisdom. Maybe Kali has to overcome the fear of the snake or figure out how to deal with it in a proper way.
In the novel Midnight Watchmen, Yu Shuyao was described as a mouse spirit. The novel mentioned her relationship with the rat spirit and hinted at her true identity. Therefore, Yu Shuyao could be regarded as the incarnation of the rat spirit in the novel.
While waiting for the TV series, you can also click on the link below to read the classic original work of "Dafeng Nightwatchman"!
This novel was called "Reborn Treasure-Hunting Mouse". After an accident, the protagonist Hu Feng was reborn into a mouse's body and obtained treasure-hunting abilities and mouse genes. I hope you like this fairy's recommendation. Muah ~😗
I'm not sure which book you're referring to because you didn't provide a specific title or author. However, generally speaking, the plot and character settings in novels are fictional and may differ from the facts that you are familiar with. If you can provide more specific information, I will try my best to provide you with a more accurate answer.
In reality, the Rat King story is more of a myth or legend. There's no concrete evidence to prove its truthfulness. It's often used in various forms of storytelling for entertainment and imagination.
The story of the Rat King often involves a group of rats forming a powerful alliance or having some sort of mysterious and mythical connection. But the specifics can vary depending on the version.