Aleph Null is a multiversal metafictional spaceship, it can travel the infinite multiverse using a Reality Search Engine that can make fictional worlds and scenarios real to visit. Aleph Null is a ship the can be crewed by almost any fictional character that can be imagined as the ship picks up and drop off any version of any character from any time. Aleph Null home base is Nexus Station in higher pocket dimension, a hub for multiversal spaceships full of all kinds of characters to dock.