Yorin was paired along with Egon Stetmann, and they were tasked with creating a portable force field of ionized gas akin to protoss plasma shields, albeit without the aid of a psi-field generator. Stetmann devoted himself to the project and finished a prototype after only a few months.
After Stetmann discovered the operations made on unwilling inmates, he was outraged, but Yorin did not share his opinions, fearing that his criticism could jeopardize her career. When the scientist released a virus into the facility, Yorin commandeered the controls of a blast door leading out of the facility in order to stop Stetmann from escaping. Still, Stetmann was able to distract her using the force field prototype which he stole moments before, opening the doors and making his escape.