Lucian is completely different from what he was in the prior games. If you remember, he could not bring himself to kill Damian, even with all that he did and tried to keep causalities to a minimum. In OS2 however, Lucian is completely fine with using Deathfog to wipe out the Black Ring and innocent Elves in the area, He goes to the Godwoken academy and slaughters every other Godwoken there so his son, Alexander is the only Godwoken. If you kill Alexander, and talk to him about it, he doesn't even seem to care. I suppose Lucian trying to ride the world of Source, thus killing The Void, God King, and God's so the races can live without the threat of them can be considered noble, but on the whole he seems like a complete arsehole now.
Divinity dragon knight saga lucian is a wise old knight who tries his best in a screwed up situation and chastise you because you royally messed up.
Divinity original sin 2 Lucian sounds like a decrepit old guy who has been mind controlled, i legitimately thought Dallis was controlling him somehow with how his voice sounded, then he just dies.
