As Ben Solo bleeds his blue crystal and turns it Red transforming into Kylo Ren, in his ear constantly was the Dark lord of the Sith Darth Sidious, Palpatine never left him even before The Rise of Skywalker.
As Ben Solo bleeds his blue crystal and turns it Red transforming into Kylo Ren, in his ear constantly was the Dark lord of the Sith Darth Sidious, Palpatine never left him even before The Rise of Skywalker.