That girl (corpse) is a simulation of your troubles. I believe this is very important to you. It doesn't matter.
However, when the corpse (female) says your name, there is a feeling that you can't throw it away, as if you did a good thing and left your name, giving people a false sense of justice, and it seems that you did a bad thing and were left with your name, which became a shame and fetter.
In this way, it makes sense not to sleep.
Insomnia comes from stress and inner contradictions. Insomnia is difficult to cure until this problem is solved.