"The Observer", previously "The Outsider", is a reference to my state of being as someone who observes other people & phenomena online, but hasn't been able to forge connections to said phenomena or people.
Eventually, when I experienced one too many occasions of losing connections I forged when I was a child as a result of circumstances, I came to rationalize it as people coming & going, molding me into a figure that comes & goes in turn. Even now that I'm about 10 % more involved, I might just slip away at a moment's notice, rarely giving a reason why.
It is also a reference to a term from a certain video game series where by acknowledging the existence of someone, observing them, people or entities that would otherwise be dead, unnatural or otherwise not supposed to exist can be made to exist. That's just the tip of the iceberg when it comes to the overly complicated plot in that franchise, by the way.