The characters of EGS inhabit several universes; most canon universes contain separate characters who can interact with each other, while most non-canon universes contain different versions of the same characters and do not interact with other universes (with the exception of the conclusion of the Blank Check for Weirdness arc). It is also common for the characters in non-canon universes to break the fourth wall. Characters with multiversal counterparts who share exactly the same name have their universe's name preceding their own to differentiate them.