system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel/DC] does marvel have a central character that's a multiversal constant like superman?

In Doomsday Clock Dr Manhattan tried to stop superman from existing by going back in time but nothing he could do would prevent it from happening. And its revealed that sups needs to exsist. Is there any person from the marvel universe that needs to exsist and will exsist no matter what changes are made to the universe?
gpt
I can't believe no one has mentioned Molecule Man. The plot of Secret Wars was completely reliant on the fact that he exists in each and every universe and each of him are just a fraction of the whole person.