Gruffydd Trahaearn is an Elven member of the Trahaearn Clan. He was responsible for making the Trahaearn exoskeleton that Lady Trahaearn was wearing while hiding from Lord Iorwerth and the automatons that protected her. He is only mentioned in The Voice of the Elders in a letter sent to him by Lady Trahaearn in which she is angry that his creations deviated from her plan and were not completely successful.