Well, I’ve been trying all day to come up with a list of characters who’re truly “Multiversal,” in the sense of being either essentially multiversal constants; who have an incartation in a huge amount of universes or are essentially the same being existing (or travelling across them enough that it’s p/ much the same)
Here’s what I got:
The Eternal Champion/Ally/Enemy/City/Consort/Black Sword/Gaynor The Damned [Michael Moorcock’s Eternal Champion cycle]
Unciron/Primus/The Thirteen [The Transformers Franchise]
Jenny Everywhere [The first Open Source Character]
The Dark Tower [Steven King’s Dark Tower series]
A Man, A Lighthouse, A Retro-Future-Aestheticed-Dystopian City [The Bioshock series, as revealed by Infinite]
Time Devourer [Chrono Trigger/Chrono Cross]
Gilgamesh [Final Fantasy]
Ravel Puzzlewel [Planescape: Torment, also Kreia in KoTOR and a few others in Icewind Dale amongst other possible Bioware games]
Rick & Morty [The TV series of the same name]
The Lord of Games [The Banjo-Kazooie series, unfortunately for everyone]
THE CTHULHU MYTHOS [All Of It]
The New Gods “Family” [DC Comics, as well as their implied origins from the death of Marvel’s Norse pantheon and their implied descndants in Jack Kirby’s creator-owned works]
The Chaos Gods [Warhammer & Warhammer 40000. Yes, including Malal]
Kamen Rider [The series of the same name, as a multiversal-archetype Heisei-onwards]
Tenchi Muyo's main cast [Because of all the AUs that series is built upon]
Amber [The Chronicles of Amber]
The Bob Hope/Bing Crosby/Dorothy Lamour stock characters [The Road To ___ Movies, including The Road To El Dorado and Ishtar too]
The Xehanorts/Kingdom Hearts/Keyblades [Kingdom Hearts. I think. Almost nobody has any idea what the fuck the continuity of that series is]
Doctor Phage/Harmburger [Awful Hospital/The Burgrr Entries/The Noisy Tenant Mythos]
Tezuka's Star System [All of Osamu Tezuka’s works]
The Marx Brothers [They always play the same chracters with different names, in presumably different “continuities”]
The Commedia dell'Arte [Theatrical Tradition]
The Planeswalkers [Magic the Gathering]
The Mystery Inc Gang {Scooby Doo, as revealed by Mystery Inc]
And here are some more dubious ones I coudl think of:
The Endless & The Speed Force [DC Comics, they seem Multiversal beyond DC, but IDK if that’s true or not]
The Kromaggs [Sliders, May count more as a multiversal empire tha ntrue “constants”]
Solego {The Disney Adventures Comics crossover Legend Of The Chaos God, Not Sure if Really Multiversal]
Bagan [A bunch of cancelled Godzilla movies from different eras, Multiversality is more my personal headcanon]
The Muppets [Not sure if meta-theatrical nature of them makes their many incarnations count as only playing those parts or if that makes them truly multiversal]
The Swine Things/The Hog [Willam Hope Hodgson’s House on The Borderlands and short story The Hog, not sure if they are truly multiversal or just “beneath the veil” of one specific universe]
The Mazoku [As a stock sort of race-name for the weird Christian Demon/Japanese Youkai mix that appears in a lot of Japanese works, not sure if that sort o thing counts]
The Loc-Nar [Heavy Metal, just not quite sure if it’s different portions of the same universe or many others]
The One [The movie of the same name, not sure if the idea’s “Wide” enough to apply]
Lord English [Homestuck. I have no idea what the fuck about Homestuck]
Patches [Dark Souls/Bloodborne, don’t know if he appears in enough other games to call truly mulitversal]
Melon Bread/BINO/Seven Force/The Stone-Like [Treasure’s games, not sure if consistently-appearing enough to count]
So, you may ask, why am I compling these?
Well, simple. These recurring archetypes; since they are multiversal and thus most likely have different (Not-held-by-copyright) forms everywhere; are a great basis for your own characters; simply through the method of asking yourself the simple question, “What would their incarnation in my setting be?”
And here is the key writing prompt: Out of the the characters from these lists you like best, what would incarnations of them look like in a personal setting that you created? And were there any I missed or some I’m kind of reaching on?