Yes Man

 is a securitron robot found in the Mojave Wasteland in 2281. He serves as Benny's assistant and can't help but reveal the end game scenario for New Vegas in excruciating detail. He was programmed to answer all questions that he was able to answer, but was never given any restrictions about who would be able to ask him questions in the first place.

Appearances
appears in Fallout: New Vegas.

Behind the Scenes
A Yes Man is a phrase used it refer to someone who will only agree with his employer or superior, in other words, a suck up.