Horowitz

 is one of the few non-ghoulified denizens of Vault 34 to have remained alive in spite of the reactor meltdown.

Background
Horowitz was one of five non-ghoulified Vault 34 dwellers to have survived. He and a few others were trapped when someone detonated a bomb in the pool area, and left an SOS in the terminal outside the reactor room of Vault 34. If the player chooses to redirect control to the backup terminal where Horowitz is located, he will free himself and the other Vault 34 survivors.

Appearances
appears in Fallout: New Vegas.