Although Will Fletcher only had a few rare appearances in “The Lord of the Rings: The Rings of Power”, it should be noted that Finrod is actually a massively influential figure in the original source material written by JRR Tolkein.
According to Tolkein’s “The Silmarillion” (a detailed account of the creation and history of Middle-earth), Finrod was the king of Nargothrong, an underground Elven city which was built by Finrod alongside the Dwarves. He was also the first of the Ñoldor Elves to discover the Men living in Middle-earth and to become very close to them – once offering a magic ring to a man named Barahir, which was then passed on to Aragorn, son of Arathorn. Finrod’s death in the books also came from Sauron, though he performed a final act of heroism when he broke free from his prison cell and rescued the hero Beren from a werewolf – dying of his wounds shortly afterwards.
Although “The Rings of Power” chooses to omit most of Finrod’s long and important history, it’s fair to say that Will Fletcher’s brief appearance still has a huge impact on the series – as Finrod’s death is the impetus for Galadriel’s quest to find and defeat Sauron and the driving force behind her story throughout the series’ first season.