Thanks for the responses so far, especially those who stuck to the topic of hated characters redeeming themselves.

Well Seymour is a difficult one, because he starts out seeming to be on your side, then goes crazy ape evil. But if I had to pick his best moment, its when he tries to persuade Wakka not to be a religious bigot about the Al Bhed and machina.

"Pretend you didn't see them."

"That's not something a maister should say"

"Then pretend I didn't say it."

Kinda cool, and even Tidus thinks he's making sense.