Halsti was a scientist at the U.S. Robotics Technology Facility RB-2851 prior to the Great War.
Background
On his birthday, Halsti's co-workers tricked him into biting down on a frosting-covered brain, telling him it was a cake. At least one co-worker thoroughly enjoyed the look on Halsti's face when he realized the cannibalism.[1]
Appearances
Halsti is mentioned only in the Fallout 4 add-on Automatron.