Guan Blackthorne is one of two sons to Cadden Blackthorne. He and Jerik were birthed from cloning cylinders, just like their half-brothers Caius and Xanic. Like their half-brothers, they themselves are not clones of either Cadden, their father, or their mother, Renalla. Rather, they were test-tube birthed. Due to unknown circumstances, their aging was, as a result, accelerated until puberty, after which the process stabilized to normal levels. The reasons for this are, to-date, unknown, and perhaps deliberate.