G'niall was a dragonrider at Benden Weyr late in the Second Interval and early in the Third Pass. His dragon was blue Carianth.
G'niall flew in M'tal's wing, until Carianth became ill with the Dragon Plague. When Benden Weyr first rose to fight threadfall, G'niall and Carianth, along with two other dragonriders and their dragons, failed to emerge from between, which affected the morale of the other riders and threw off their formations.