I'm a very lonely person, I am so lonely I gave myself a name, Self. I'm Mike / Self, kind of like Golem and Smeagle. I have conversations with Self all the time, he is a very good friend.
Now, there is Nega-Mike, who is the alternate side of my Ego. He always tries to make things harder. Self and Nega-Mike are the two sides of my Ego. Good and Bad.
Bob The Invisable is the invisable thing that exists. He is jut there I can't even see him.