Theresa Chasar (Doom 3)

Theresa Chasar was one of the few female UAC employees in Doom 3. She is named after the sister of Tim Willits, the co-owner of id Software. According to her PDA, she was involved in research with other UAC scientists on the Plasma gun.

During the Enpro level, the player can hear a female voice crying. Upon entering Theresa's office, she approaches him and pleads for help, but then her head and spinal cord rip out to form a Lost Soul which attacks the player.

Many more Lost Souls are encountered during the game, although this is the only time when one is seen to originate from a living human.