Survivor

The Survivor seems to be one of the scientists of Vault 106, evidenced by his/her white lab coat. Vault 106 was the location of tests of hallucinogens on human subjects. He/she is a hostile NPC and starts to attack right away. While fighting him/her a hallucination starts and your childhood bully, Butch DeLoria, and two of his friends start attacking. When low on health, the "Survivor" will use a Stealth Boy causing you to miss any shots taken in V.A.T.S.

You can take his/her Vault Lab Uniform which gives a +5 Science bonus to your stats.