Little Zi carefully burrowed into the ground.
Some might think that since a female demon has no physical body, can she not go anywhere within the earth?
But that's not the case. A pure energy-form demon can break free from gravity's hold; however, once gravity's guidance is lost, they too lose their sense of direction. It doesn't matter much on the surface, but once they enter the soil layer, the lack of a directional sense quickly becomes a hindrance. Without it, they can quickly become lost and start to aimlessly circle underground.
Therefore, going underground without any assistance is extremely dangerous.
But Little Zi was different. She was continually using the demonic wails to trace her path.
Soon, she found the source of the sounds.
