Jakk was a Confederate security guard for the Old Families' scions off-world. He guarded them at a resort on Tyrador IX until the Fall of Tarsonis. Arturro Calabas, the sponsor for the expedition, ordered them to flee to Shi, the fourth planet of the Baker's Dozen.
The planet was secretively infested by the zerg, and Jakk encountered them during a vulture patrol. He was captured and infested by a queen. When the heirs were taken on a bus trip, he attacked alongside with numerous other zerg. He was shot at and wounded during the fighting, but survived.
A month later, he joined a massive attack against the Old Family camp. He was recognized shortly before he blew himself up.