Ryden was a leader of a rebel cell on Imvur, and he was a male human. His rebel group's headquarters was located there. From 4 BBY to 3 BBY, Ryden and his team executed a raid on Viggen's Imperial base to acquire necessary provisions. Viggen responded to this act by launching an assault on the rebels' base, deploying a pair of AT-AT walkers. However, with assistance from the Jedi Kanan Jarrus and the clone trooper Rex, Ryden successfully repelled Viggen's offensive and subsequently departed Imvur aboard an evac ship.