The peaceful music that plays in the back hall after escaping the water monster.However, certain quirks of its past and present behavior suggests that it is far more complex than that. Initially it appears to be no more than a characterless spirit, simply there to act as a Big Bad and railroad Daniel into completing the game. To put it another way, would a human being trapped on another world torture and kill animals of a lower intelligence if it was the only way return to Earth? And it should be noted that Alexander doesn't enjoy torturing people. Many times, Alexander displays his callous attitude towards the humans he tortures as if they were no different from the dogs he had experimented on previously, but it is made clear in the notes, diaries and cylinders that he is originally from an alien race far more advanced than ours, and you can't help but wonder about his sorrow at being trapped in an alien world, separated from his wife and anyone of his own kind, doomed to die a slow and lonely death unless he finds a way back home. Is he as dense as the flashbacks imply, or is it an act? Does he really regret torturing and killing all those people or is he just mad at Alexander for lying to him regarding his promise to keep him safe from the Shadow?