SCP-073, who refers to itself as "Cain", is generally polite and genial to all who speak to it, it has been described as being cold and mechanical in its speech. Very helpful. Has highly detailed knowledge of ancient to recent events in history, and all spoken languages in the world, including ones that have since died out. Any damage directed towards 073 is reflected back to its attacker. 073 rather not talk about its past or family, or the mark on its forehead; it saddens him.