He joined the Cult not long after the death of his beloved wife Eiko. The couple had a daughter, Ilena; therefore Joshua also brought Ilena with him into the Cult, forcing her to practice their customs and rituals against her will. A rebellious teen, she became increasingly frustrated and sought to escape.
Ilena's secret plans to elope with a bard, Athanasi, were unknown to Joshua, who was focused on the faith. When she disappeared, he blamed himself for failing to protect her from the world.
After the death of Vor, Joshua fled to the nearby city of Kronos, where he lived under the protection of a local lord who sympathized with the cult. He eventually returned to the site of the cave where the Cult had dwelled and helped with the building of the Temple of Vor, putting his skills to work in its construction and decoration. According to legend, the strain of the work led to him dying as soon as it was finished.