Jerilli was a dragonrider at Sky Weyr late in the Second Interval and early in the Third Pass. She Impressed her blue dragon during the Second Interval.
Jerilli, like all the other new riders on the Western Isle, had been rescued from the time between the last of the Dragon Plague and the start of the Third Pass. When the new riders began training to fight Threadfall, Jerilli became the blue leader of the northern contingent sent by H'nez.