<color=purple> Yaag Rosch. Orphan. Possibly a few other villains from the newest addition to Final Fantasy.
<spoiler=FFXIII Spoilers><color=purple> Rosch, it turns out, was really trying to do his best to help others. By the time he realizes his inability to help the situation and that he has been manipulated, he can't undo what he has done, but he comes to his senses and lets our l'cie move on to save the world.
Orphan was just made that way....by the "Maker", and all he wanted to do was die. For what he/she thought was best for the world.
And there is also Cid Raines, but I didn't mention him before in case some people still playing this epic game didn't know that he goes ballistic on our heroes. He thinks that the L'cie are being manipulated and if he can stop them, by killing them, he can save the world from its cruel fate.