Leingod
Immaculate Blooming Lotus
Crossposting an idea I had that I brought up on the SB thread, TLDR version is that it's an idea for a Demon OC/SI that learned martial arts from Mutaito centuries and now wants to train people in it, using this one filler episode from the OG series as a launch point:
Leingod said:I remember I had an idea for an SI where the MC is a Demon, utilizing that filler thing with Shula and the gate he opened. They'd have lime-green skin and be named "Citrin," which is both a kind of citrus fruit and a part of Vemacitrin, the name of a Buddhist asura. And they'd "take over" Satan Castle as the master of the future Mr. Satan's master (purely because I think it fits the name so well).
I also had this idea that uses the filler thing where this old couple initially take in the newborn Piccolo Junior as a play on the Superman thing, but before Piccolo can burn their house down and run off into the wilderness the SI shows up to keep him in line and convinces Piccolo to accept him as a mentor, trying to help him work toward letting go of his father's vendetta and becoming his own person instead of just King Piccolo reborn. Sort of like a reversed take on the Piccolo/Gohan mentorship dynamic.
Like, imagine a Piccolo who grew up raised by a pair of old farmers, and they're just cheering him on in the stands during the tournament as he tries to play the big villain intent on conquering the world but his heart's already really not in it and he's only really still holding onto the vendetta against Goku. I think that'd be fun.
Leingod said:Had some new/more developed ideas for this.
Starting all the way back in Age 461 (maybe move it back a year to make this flow better), to when the Nameless Namek first split apart into Kami and King Piccolo. King Piccolo enters the Demon World - either of his own accord, or perhaps Kami attempts to banish him there - through the gate that Goku later encounters in a filler episode of the original series. The reason demons are guarding the gate is not so much to keep demons or humans from intruding on either world, but rather that they just want the gate to stay closed because Ki from the Living World is very different from Ki from the Demon World (which is also called "Dark Energy" in stuff like the Heroes games). Demon physiology is well-adapted to Dark Energy, but not to Ki; as a result, demons stuck in the Living World are much weaker while they're there (or, looking at it another way, are greatly strengthened by Dark Energy).
Wiki link to the filler episode in question: Goku Goes to Demon Land
Anyway, the future King Piccolo goes through the gate, and whether through apathy with their job or because they can sense the evil in his heart and figure he'll make a decent demon, the guards let him go on his way. So he goes deep into Demon World, gets exposed to enough Dark Energy to become a demon, and then goes back to the Living World intent on his using his newfound strength to conquer it, not realizing he'll be much weakened once he's through (maybe he threatens/intimidates/attacks the guards and so they won't let him come back in).
Some years later, the door opens again, and the guards ready themselves only to find it's an Earthling. Specifically, it's Master Mutaito, who's tried and failed to fight King Piccolo and now has gone on that years-long journey where Roshi doesn't know what he's doing, just that eventually he'll come back with the Evil Containment Wave. A gate to the Demon World would sound like a good place to try to find some kind of weakness, after all. Even with the gate opened, Mutaito isn't strong enough to force his way past the guards, but that's fine because all he wants is information, and the demon in charge of the guards, Shula, finds Mutaito's display of martial arts intriguing and wants to learn them, so they make a deal (this is in keeping with the idea that was present in early DBZ but kind of dropped off, that Earthlings are actually special - not quite unique, but almost so - for having figured out stuff like how to grow appreciably stronger through training rather than relying on innate power). Most of the demons present don't learn much from it - they don't really have the discipline for it - but Shula and a few of his followers, including Melee and Gola, find themselves learning quite a bit from Mutaito and come to respect him a lot by the time he leaves. (This is partly inspired by the way Shula and co. have a more martial arts flavor to them than most of the demons introduced from Z onward, who tend to have much more sorcerous vibes or are just yet more big strong bruisers).
About three centuries later, the Demon King Dabura has been missing for a long time (since Age 474, actually) and doesn't seem like he'll be coming back anytime soon, if he's even still alive. With the Demon World essentially leaderless, nobody really notices that Shula has decided to open up the gate to the Living World and use a cursed sword he found somewhere to keep it open as long as he wants. Shula feels disillusioned with the Earth he sees, having expected something more like Mutaito's stories about the great heroes and martial artists of his own day and a bit pissed that no one even seems to remember Mutaito, and starts taking out his disappointment by letting his mooks fool around and terrorize the locals. Kind of like how Shen got all bitter and went back to being the asshole he was as a teenager, now that I think of it.
But while Shula's doing that, another of his followers - this being Citrin, the character described in the quote above (ditching the SI aspect) - goes out into the world instead to see if there really is no memory of Mutaito and his martial arts left, and deciding that, if there really isn't, then they owe it to him to bring that back. Though, despite that fairly "good guy" goal of wanting to pass on Mutaito's teachings and see martial arts flourish on Earth again (and maybe eventually the Demon World and beyond, too), like a lot of the strongest characters in this franchise I'd probably write Citrin as not really being a clear-cut hero, at least at the start. In this case, Citrin is only really interested in those strong enough to catch their attention, and kind of just ignores everyone else as not worth bothering with. That's something I'd write as a typical worldview for demons, who revere strength above everything else; Citrin most differs by being merely apathetic toward the weak rather than sadistic, and by having at least some concept of strength at something that goes beyond the purely tangible (you don't learn from an old master like Mutaito and still come away convinced that "strength" refers purely to how hard you can punch, is my logic).