Tex is the main antagonist of the THX Tex Trailer creepypasta Series, He is actually a neutral-sided robot made by THX Company. However, in this series, he is portrayed as a vengeful, deranged and wrathful psychopathic killer robot.
There are roughly one-sh*t billion tropes so PLEASE look through them before adding one. Otherwise add what you like. ADDITION: PLEASE read through the trope description provided before submitting something. It's not a huge deal but too often people submit characters that don't fit just because they misinterpreted the title...