Jirken once lived in the city of Shallam. However, the citizens of the Jewel of the East disapproved of his experiments, as they had a tendency to harm or even kill volunteers, and hence locked him away. He remained this way for an indefinite number of years before finally being freed by Mhaldorians on the 1st of Lupar, 337 AF and taken to Mhaldor, where he continues to conduct mysterious and bizarre experiments to this day. Bald and small in size with large, intense eyes, he fits the stereotype of a mad scientist like a glove.

Jirken has played small but pivotal roles in Mhaldor's history since then, most recently of all in the Jaru War, during which he produced the acid that was used to melt the gates of the newly constructed walls of Jaru village.