Twohy was a marine of Torch Seven. Twohy took part in the unit's ill-fated mission to Vygoire, assigned to investigate a Dominion lab complex that had stopped responding to hails. Terrestrial and orbital observation showed that while the complex had suffered damage, it appeared to be from natural causes, such as a landslide. As per urban-recon protocols, the facility was investigated, the unit discovering human remains, but no living scientists. During the fighting, Twohy became pinned underneath a tree. As the ultralisk retreated from the platoon, it crushed him under its feet.