We got a bit more insight into his sinister face and frame in
How did Snoke get his scars? Following the release of The Last Jedi the actor who portrays Snoke, Andy Serkis, stated in an interview that Snoke's scarring was a combination of war wounds and the natural decay of an old body.
It seems improbable that Snoke did not know that Palpatine created him, but despite being steeped in knowledge surrounding the Dark Side, there is no evidence in any of the canon content that Snoke knew Palpatine was alive, let alone that he created him.
It reveals Snoke was originally created as a potential host for Palpatine's own disembodied spirit, but his strand-cast body was unable to contain the Emperor's dark side essence; it's likely Palpatine's attempt to possess Snoke's body was the reason for the latter's disfigurements.
That didn't stop fans speculating on whether Snoke was really Darth Plagueis or Anakin Skywalker's evil twin or something else entirely. It didn't turn out to be anything as grand when The Rise of Skywalker revealed that, actually, Emperor Palpatine was in charge all along.
Why Darth Plagueis Was Terrified of Anakin But Sidious Embraced and Trained Him - YouTube.
In a new excerpt, it's revealed that the names of Rey's parents are Dathan and Miramir. Dathan is the dad and Miramir the mother, if you were wondering; it's not always clear with these names from a long time ago in a galaxy far, far away.
In Darth Vader: Dark Lord of the Sith #7 by Charles Soule and Giuseppe Camuncoli, Emperor Palpatine admitted that the Jedi he most feared was not a skilled fighter or a Force prodigy, but a relatively weak Jedi.
Elite Praetorian Guard
Clad in ornate crimson armor, these warriors guarded Supreme Leader Snoke, ready to meet any threat with a savage response. The Guard consisted of eight sentinels divided into four pairs, with each pair brandishing unique weapons.
In the Star Wars Legends continuity, the founders of the Jedi Order were Jedi Masters Cala Brin, Garon Jard, Rajivari, and Ters Sendon.
Darth Jar Jar, known to most as Jar Jar Binks, was a Gungan Sith Lord. He survived the Battle of Naboo and became a Representative of Naboo, when he helped to give Darth Sidious emergency powers.
Emperor Palpatine created Snoke to be his proxy through which he could regain his power. Although Snoke was bio-engineered in a lab on Exegol, he was a strand-cast, not a clone. This bit of Star Wars jargon means Snoke isn't an exact copy of anyone, but isn't natural-born either.
At some point, Snoke had an encounter with Skywalker, in which he was damaged by the Jedi Master to some degree.
So, Kylo slowly turned his saber and also Rey's at the same time. Rey's of course was conveniently at Snoke's side. And then the trap set, Kylo committed fully to his plan and ignited Rey's saber through Snoke's body and severed him in half.
For those who've been wondering why Snoke looks so scarred and deformed, Serkis says it's a combination of both past conflicts and his body wearing down. As the actor explained: It is to do with previous battles. It's a sort of decay as well.
This information comes to light form the comic series Darth Vader: Dark Lord of the Sith by Charles Soule and Giuseppe Camuncoli, in particular issue #7. Palpatine admits to Darth Vader that the Jedi he actually feared most was none other than Jocasta Nu.
Eventually, another three-eyed child, Triclops, was born. Rumor had it that his mother was Palpatine's Umbaran aide Sly Moore, who had impregnated herself using DNA from an undisclosed source.
The Jedi however also have three outliers in that of Luke, Leia, and Cade Skywalker (23000/23000/21000 midi-chlorians respectively) all of which were children/descendants of Anakin Skywalker (the chosen one) and so genetically predisposed to having abnormally-high midi-chlorian counts for Jedi.
Though initially trained as a Jedi by his uncle Luke Skywalker, Ben was seduced to the dark side of the Force by Supreme Leader Snoke, and aspires to be as powerful as his grandfather, the Sith Lord Darth Vader / Anakin Skywalker.
Legend had it that Yoda—a Jedi who became Grand Master—was trained by N'Kata Del Gormo. A Force-sensitive Hysalrian, N'Kata Del Gormo was trained in the ways of the Force and achieved the rank of Master within the Jedi Order.
The Last Jedi took the stance that Rey's parents were nobody, and while this may have been true from a certain point of view, The Rise of Skywalker gave us the true answer to Rey's parentage. In the film, we learned that Rey was a Palpatine, and her father was a clone of the infamous Sith Lord.
Despite being enemies, Rey and Kylo Ren share a connection called a 'Force dyad' and eventually become romantically involved with one another. Following Palpatine's final defeat and her own resurrection, Rey adopts the name Rey Skywalker to honor her mentors and their family legacy and renounce her lineage.
What is the connection between Kylo Ren and Rey? As Kylo Ren himself says in The Rise of Skywalker, he and Rey are bonded not just by their familial legacies (Ren as the grandson of Darth Vader and Rey as the granddaughter of Emperor Palpatine) but by their unique connection in the Force.