Via Screenrant.com:

Rey constructs a unique yellow-bladed lightsaber at the end of The Rise of Skywalker, and it’s a far cry from Luke and Anakin’s blue saber.

At the end of Star Wars: The Rise of Skywalker, after burying the lightsabers of her mentors Luke Skywalker and Leia Organa, Rey reveals her newly-constructed, yellow-bladed lightsaber – but it’s noticeably different in several ways. Set decades after Luke Skywalker revives Jedi traditions in Return of the Jedi, the Star Wars sequel series features a number of characters reckoning with the legacy that he and his companions left behind. Prime among them is Rey, whose journey along the Jedi path is complicated by her familial relationship to Sheev Palpatine, one of the fiercest Sith Lords of all time and the architect behind the near-extermination of the Jedi.

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