"Adam" (once known as Erich von Raitenau) is the leader of Delphi. The heart of it all and is fully convinced his cause is a just one. He's a man with a mind that has been twisted by hardship, age and disease that has deluded him into thinking that he only knows the true way to humanity's destiny. He speaks with a mostly calm demeanor but there's bitterness in his voice when he is arguing with those that would dare to disagree with him. Bottom line, he's an old man set in his ways and there is no changing his mind. We're looking for a lower tone voice that while sounding tired is still filled with conviction. 

To give a slight example of the voice range, think of The Puppetmaster from the 1995 Ghost in the Shell film. Not required to sound exactly like him. Just an example of what we would like.

Also fair warning: This guy does not know when to shut up.