"I am the part of you that you hate". — Sun towards the Creator, probably
You know, I've been thinking a lot about TSAMS and the direction the show is taking, a direction I'm not really liking too much... so how about we ignore canon for a few seconds and you listen—read—a little "What if..." that's been on my mind lately? Who knows, maybe I'll even make an AU just because I like the concept.
Do you remember the creator? I hope so! (I'm just being sarcastic, sorry.) But anyway, I always found his relationship with his creations, Sun & Moon, interesting. The idea that Sun & Moon were basically a rushed and unfinished project is intriguing to me. I think it could have led to a lot of angst, delved deeper into the story, and perhaps answered some questions the twins' behavior raises. But since the show killed off the creator way too soon, we're going to be left with those questions forever.
Anyway~ some headcanons and other stuff are coming in here, you've been warned! But it's interesting how Moon is (somewhat) portrayed as the Creator's creation who most resembles him, you know, super intelligent and a bit cynical? With a big ego? Believing he can do everything because Sun is too "soft and dumb" to be of any help? Yeah? Uh-huh... I was thinking, what if it were the other way around? What if Sun is the one who most resembles the Creator? And I don't mean the Creator we all saw on the show, I mean the Creator when he was young.
Because I don't believe that all beings are born powerful, I don't believe that everyone is born an evil mastermind! I think... that a long time ago, the Creator probably had another name, another life. I think he used to be weak, someone everyone took advantage of, pathetic until something changed and he rose to the top.
I like to think that when he created Sun and Moon, he wanted to create a being that was like his "best version" from the beginning; he tore away parts of himself that he considered "worthy and better" and gave his intelligence to Moon, his analytical mind, his cynicism, all to try to create a mini him (probably out of ego) and to Sun, he gave the things that the Creator considered pathetic and weak; kindnes and a caring nature.
That would give the family a pretty interesting dynamic:
Sun, who wants nothing to do with the Creator, ends up being the one who most resembled him in his early days, and the Creator hates him for it. He hates seeing the part of himself he thought was pathetic and weak keep going in life despite everything. I think it would make him jealous, in a "why are you like this when I can't be?" kind of way. I think he would hate that Sun succeded where the Creator himself failed, so he tries to make his life as miserable as possible because of it...
This provides a perfect opportunity to give Sun a "villain arc." A scenario where Sun couldn't take the pressure anymore and broke, just like the Creator did at some point, and it leads him down a path that would leave him in the same shoes as the Creator: a person who grew weary of life and decided to bite back! Oh, the angst! Sun, realizing that he is becoming more and more like the Creator but unable to stop because everything in his life is terrible... perhaps Sun could emerge unscathed, saying "life is shit but I remain true to myself and my principles" and doing something the Creator failed to do: remain a good person even when life spits in your face.
...Or perhaps he could fail, perhaps Sun would end up just like the Creator, dying at someone's hands because Sun is so far gone that there's no saving him.
It would be almost poetic no matter which way the story turns, it doesn't matter if Sun triumphs or not, what matters is that at the end of the day, the Creator and Sun are the same, that dynamic of not being two sides of the same coin, but being the same side that ended up falling either in the same place, or in a completely different one.
I found it an interesting thought; I didn't explain it very well because I don't really know how to explain the dynamic I have for Sun and the Creator in my mind, but well, it was just a little thought.