That unconscious guy's name is Niles.
In his home, the sand sculpture found the certificate issued by the Willant people to the alien, on which the name was written, and there was a long family name behind it.
As for whether it is a real name or a pseudonym, it doesn't matter to him. It's just a code anyway.
All he needs to know is that the guy tied to the chair is a member of the Enlightenment, and this shabby house hidden in Blackwater Lane is the stronghold of the Enlightenment in Eternal Night Harbor.
This is enough.
When he woke up from his coma, Niles raised his heavy eyelids and stared at the place where he rummaged around his house