Cedar Lowell

Cedar Lowell is the author of the Aincrad Infinity and Aincrad Infinity Alternate series. He has also authored a separate Sword Art Online fanfiction titled Lost Bonds (read here) and a Legend of Zelda: Twilight Princess fanfiction titled Penumbra (read here).

Cedar's former pen name is "Aydan Nightshade", and you may still see some works under that pen name.