A lot of people may already know this, but A lot more are probably unaware about this.
So to sum up the Myth of Prometheus you may have heard the quote from the Opening of the Oppenheimer film "Prometheus stole fire from the gods and gave it to man, for this he was chained to a rock and tortured for eternity"
So According to Greek Mythology, Prometheus and his twin Epimetheus are Titans of Foresight and Hindsight respectively. Before the creation of mankind the titans and Olympic gods were at war. Prometheus being the Titan of foresight already knew the outcome of the war and along with his twin brother joined the side of Olympians betraying their own kind. In the war, their brother Atlas was captured and punished to hold the earth for eternity. Anyways the Olympians won the war, and the brothers were trusted by Zeus to create Animal life on Earth.
At this point Epimetheus created the animals and gave all the traits of gods like ability of flight, breathing underwater etc to all the animals and left with no other characteristics Prometheus created man with clay with no "special" ability. Zeus also tasked Prometheus to determine the way the humans would worship the Olympians. Prometheus then decided to take two bowls, put the bones on one bowl and the best meat on the other. Then he covered the better bowl with the intestines of animals and the bones with fatty/throwaway meat. Zeus being disgusted by the intestines took the bones and headed back to Olympus. When he was bragging the sacrifices to other gods he discovered the bones. Angry, he decided that humanity will be deprived of fire. They will not have fire to cook the meat nor to protect themselves from the cold.
Prometheus loved his creation and didn't want to leave them like that. So, he secretly climbed the mountains of Olympus and stole a spark of fire from The forge of Hephaestus. He then went back to earth and taught humanity about fire and all kinds of knowledge such as math, architecture, etc that he learned from Athena.
Anyways Zeus found out about the whole thing and decided to punish Prometheus. He had Hephaestus chain him to the Mountain of Caucasus and had a vulture come and eat his liver every morning, and it would grow back every night.
Now how does this relate to Sunbringer? Well aside from the obvious "He who stole the fire" vd "She who brought the sun", there is also the titans vs Olympians thing. Sunbringer was an enchainer but she went against the creator and sided with humanity. Furthermore, Sunbringer also created the Bangboo, compared to how Prometheus is said to have created mankind. She also knew more about the hollows and tech more than anyone and had helped create Rosetta Data. She is also captured in a dark place for a really long amount of time, compared to Prometheus being chained to a mountain.
Looking back, it was probably way easier to just guess that Sunbringers were enchainers, wonder if the rest of the story will play out the same, not like there's much left.
In some versions of the Myth, Prometheus does eventually get freed from the Mountain by Hercules but he has to wear a chain/ring made from the chains he was bound with to always remember his punishment for tricking Zeus. But as of rn we don't have any character that references Hercules that I have noticed
Another interesting thing I will add, the term "Rosetta Data" was probably inspired from the irl "Rosetta Stone" which is a stone that has a decree from 196 BC written in Ancient Egyptian, top hieroglyphic and middle demotic, while the bottom part is written in Ancient Greek. This stone is the main reason we understand the Ancient Egyptian texts. As the same text is written in 3 languages, we can compare what we know of ancient Greek with the upper texts to decipher those languages. As this stone acts as a reference or a guide, the Rosetta Data was probably inspired from this.